Source Index

Item-specific citations are linked directly in each food card via the "View Source Data" link. The references below are recurring sources cited across multiple items.

1. USDA Pesticide Data Program (PDP), ams.usda.gov/datasets/pdp

2. FDA Total Diet Study, fda.gov/total-diet-study

3. FDA Total Diet Study, PFAS Results, fda.gov/tds-results

4. Microplastics in Fruits and Vegetables, PubMed, ncbi.nlm.nih.gov/PMC10455475

5. Mercury in Commercial Fish and Shellfish, FDA, fda.gov/mercury-levels

6. Chemical Residues & Contaminants, USDA FSIS, fsis.usda.gov/chemical-residues

7. Mycotoxins in Food, FDA, fda.gov/mycotoxins

8. FDA Pesticide Residue Monitoring Program, fda.gov/pesticide-residue-monitoring

9. PFAS in Food, FDA, fda.gov/pfas-in-food

10. BPA in Food Contact Applications, FDA, fda.gov/bpa-food-contact

11. Bovine Somatotropin (rBGH/rBST), FDA, fda.gov/bovine-somatotropin

12. Antimicrobial Resistance, FDA Animal Veterinary, fda.gov/antimicrobial-resistance

13. Closer to Zero: Reducing Childhood Exposure, FDA, fda.gov/closer-to-zero

14. EWG Dirty Dozen & Clean Fifteen, ewg.org/foodnews

15. EWG PFAS Pesticides in Produce (2026), ewg.org/foodnews/pfaspesticides

16. EWG, PFAS Contamination in California Produce, ewg.org/research/forever-chemicals-produce

17. Mitigating Toxic Metal Exposure Through Leafy Greens: A Comprehensive Review Contrasting Cadmium and Lead in Spinach, Seyfferth et al., GeoHealth (2024), PMC11181011

18. PFAS in Seafood & High Seafood Diets, Dartmouth Study (2024), dartmouth.edu/pfas-seafood

19. PFAS in Processed Meats, Tea & Food Packaging, Keck/USC Study, keck.usc.edu/pfas-study

20. A meta-analysis of the effects of exposure to microplastics on fish and aquatic invertebrates, Foley, Feiner, Malinich & Höök (2018), Science of the Total Environment 631-632:550-559, doi.org/10.1016/j.scitotenv.2018.03.046

21. Arsenic in Rice, FDA Risk Assessment, fda.gov/arsenic-rice

22. Glyphosate in Oat Products, EWG (2019), ewg.org/glyphosate-oats

23. Heavy Metals in Produce Supply, Food Protection (2025), foodprotection.org/cadmium-spinach

24. Nitrate & Nitrite in Food, MCL 10 mg/L nitrate and 1 mg/L nitrite, Nitrate/Nitrite Toxicity: Standards and Regulations, ATSDR

25. Fluoride in Food & Water, bottled water capped at 0.7 mg/L when fluoride is added, Fluoride, Health Professional Fact Sheet, National Institutes of Health

26. PFAS in Food, Questions & Answers, FDA, fda.gov/pfas-qa

27. Occurrence and Characteristics of Microplastics in Wild and Farmed Shrimps Collected from Cau Hai Lagoon, Central Vietnam (2023), PMC10305481

28. PCBs & Contaminants in Farmed Salmon, PMC Review, PMC7766777

29. PFAS Migration from Food Packaging, Whitehead & Peaslee, Env. Sci. & Tech. Letters (2023), doi.org/10.1021/acs.estlett.3c00083

30. Mycotoxins in Cereals & Grains, IFT Review, ift.onlinelibrary.wiley.com

1. Atopic dermatitis prevalence (20% children, 3% adults), Annals of Nutrition and Metabolism

2. Virgin coconut oil vs. mineral oil, pediatric eczema (2014), International Journal of Dermatology

3. Psoriasis keratinocyte turnover (28 days to 3–5 days), Merck Manual Professional Edition

4. Psoriatic arthritis prevalence in psoriasis patients (up to 30%), Rheumatology Advisor

5. Bakuchiol vs. retinol for facial photoageing, RCT (2019), British Journal of Dermatology

6. Lead in 400 lipstick samples, FDA survey, FDA Supporting Document, Lead in Cosmetic Lip Products

7. Lead in lipstick, Campaign for Safe Cosmetics (2007), Environmental Working Group

8. PFAS in cosmetics, 231 products tested (2021), Environmental Science & Technology Letters

9. 5% tea tree oil shampoo for dandruff, RCT (2002), Journal of the American Academy of Dermatology

10. Standardized scalp massage and hair thickness (2016), Eplasty

11. Oral cavity bacterial diversity (~700 species), NIH News in Health

12. Tongue scraper vs. toothbrush, VSC reduction (2004), Journal of Periodontology

13. Hydroxyapatite as 95-97% of tooth enamel by weight, Synthetic hydroxyapatite: a perfect substitute for dental enamel in biofilm formation studies, Scientific Reports (2025)

14. Menstrual cup safety and leakage, systematic review (2019), The Lancet Public Health

15. Thinx PFAS lawsuit settlement, official case record and terms, Dickens v. Thinx Inc. Settlement, Official Settlement Website

16. Sunscreen ingredient systemic absorption, pilot study (2019), JAMA

17. Sunscreen ingredient absorption, follow-up RCT (2020), Matta et al., JAMA 323(3):256-267

18. Biotin supplementation and nail thickness in brittle nail patients, Journal of the American Academy of Dermatology

19. EU fragrance allergen disclosure rules, expansion to 80+ substances, EU Regulation 2023/1545

20. Sleep quality and skin aging/barrier recovery, Clinical and Experimental Dermatology

21. Drinking water and skin hydration, systematic review (2018), Skin Research and Technology

22. Zinc gluconate vs. minocycline for inflammatory acne, RCT, comparative clinical trial

23. Omega-3 fatty acids for acne, evidence review (2024), Journal of Integrative Dermatology

24. The 500 Dalton rule: molecules above roughly 500 daltons generally cannot cross the stratum corneum, limiting skin penetration of larger actives, Bos & Meinardi (2000), Experimental Dermatology 9:165-169

25. Dandruff and seborrheic dermatitis driven largely by the scalp commensal yeast Malassezia interacting with sebum, with antifungal activity the common mechanism of effective treatments, Seborrheic Dermatitis and Dandruff: A Comprehensive Review, PMC4852869

26. Three contributing facets of dandruff and seborrheic dermatitis: Malassezia yeast, sebaceous lipids, and individual sensitivity, DeAngelis et al. (2005), Journal of Investigative Dermatology Symposium Proceedings 10:295-297

27. Oxybenzone shown toxic to coral in laboratory studies, informing sunscreen bans in Hawaii and elsewhere, Downs et al. (2016), Archives of Environmental Contamination and Toxicology 70(2):265-288

28. Review noting reef bans rest on preliminary, non-standardised ecotoxicology and that inorganic (mineral) filters also carry documented aquatic toxicity, with "reef safe" used as a marketing term, Toxic effects of UV filters on coral reefs revisited, Environmental Sciences Europe (2021)

1. Indoor air pollution ranked among top 5 environmental health risks, US EPA, Indoor Air Quality

2. Latex paint VOC emissions, less than 50% released in first year (1999), Sparks et al., Indoor Air 9(1):10-17

3. VOC content standards for latex and low-VOC paint, Consumer Products Program, California Air Resources Board

4. WHO indoor air quality guideline for formaldehyde (0.1 mg/m³), WHO Guidelines for Indoor Air Quality: Selected Pollutants

5. Water-based and oil-based polyurethane floor finish VOC content, flooring industry VOC comparison data

6. Chromated copper arsenate (CCA), history and 2003 residential discontinuation, US EPA, Chromated Arsenicals (CCA)

7. Arsenic-treated wood, children's cancer risk data (Nov. 2003), National Center for Healthy Housing

8. Engineered stone crystalline silica content and fabricator silicosis risk, NIOSH Science Bulletin, CDC

9. Silicosis among engineered stone countertop fabrication workers, California (2023), Fazio et al. (2023), JAMA Internal Medicine 183(9):991-998

10. Estimated 100,000 US stone fabricators at risk of silicosis, InvestigateTV, citing Fazio et al.

11. Sheep's wool insulation moisture tolerance (up to 30% of weight), Homebuilding & Renovating

12. Cellulose insulation recycled content (82–85%), US Department of Energy

13. GREENGUARD certification VOC emission standard (500 μg/m³ total VOC limit), UL GREENGUARD Certification, UL Solutions

14. GREENGUARD Gold certification VOC emission standard (220 μg/m³ total VOC limit, stricter for schools and healthcare), What Does "GREENGUARD Certified" Mean?, UL Solutions

15. Green Seal GS-11 standard, PFAS prohibition (2025), Green Seal, GS-11 Paints, Coatings, Stains, and Sealers

16. PFAS in stone sealers and building materials, Green Science Policy Institute

17. Full-room study of formaldehyde from MDF, with strong seasonal variation (summer peaks several to twenty times winter levels) and a 20-65% decline in the second year, Long-Term Formaldehyde Emissions from MDF, Environmental Science & Technology 49(17):10349-10356 (2015)

18. Urea-formaldehyde adhesive depolymerising and releasing formaldehyde under heat and humidity, with no-added-formaldehyde boards far less susceptible, Long-Term Formaldehyde Emission Potential from UF- and NAF-Bonded Particleboards, Polymers 12(8):1852 (2020)

19. Systematic review of polyurethane insulation and indoor environmental quality, noting possible isocyanate exposure above legal limits during spray-foam application without protection, and that properly installed and fully cured foam is considered essentially inert, Polyurethane insulation and household products: a systematic review of impact on indoor environmental quality, Building and Environment (2020)

1. Vagus nerve afferent/efferent fiber composition (~80% afferent), Scientific American

2. Room light before bedtime suppresses melatonin onset and duration, Gooley et al., Division of Sleep Medicine, Harvard Medical School

3. Alcohol and sleep quality, dose-dependent reduction, Older Finnish Twin Cohort study, Alcohol use and poor sleep quality: a longitudinal twin study across 36 years

4. Breath-hold time (BOLT/Control Pause) as a marker of respiratory fitness, Oxygen Advantage, BOLT score methodology

5. Mouth taping for snoring and mild obstructive sleep apnoea, preliminary clinical study, mouth-breathers with mild OSA

6. Buteyko breathing method, asthma symptom control evidence, Buteyko Clinic International, citing Cochrane review evidence

7. Revised estimate of bacterial cells in the human body (~38 trillion), Sender, Fuchs & Milo, PLOS Biology (2016)

8. American Gut Project, plant diversity and microbiome diversity, McDonald et al. (2018), American Gut: An open platform for citizen science microbiome research, mSystems 3(3)

9. Antibiotic-induced decline in gut microbial diversity, incomplete recovery months after treatment, Understanding the impact of antibiotic perturbation on the human microbiome

10. Distribution of serotonin in the body (90-95% outside the brain), ScienceDirect, serotonin in the gut review

11. Gut-microbiota-targeted diets (fiber vs. fermented foods), 17-week RCT, Wastyk et al., Cell (2021)

12. Probiotic supplementation and eczema prevention, strain-specific evidence, Szajewska & Horvath, systematic review and meta-analysis

13. Calorie restriction and psoriasis severity (PASI score) reduction, randomized clinical study, weight loss and psoriasis severity

14. Mindfulness meditation during phototherapy roughly doubling the rate of psoriasis skin clearing, Kabat-Zinn et al. (1998), Psychosomatic Medicine 60(5):625-632

15. Daily step count and all-cause/cardiovascular mortality, 78,500-adult UK Biobank cohort study, Prospective Associations of Daily Step Counts and Intensity, JAMA Internal Medicine (2022)

16. Brisk walking cadence and all-cause mortality, JACC, daily step counts and cardiovascular events

17. Trampoline jumping producing greater biomechanical stimulus than treadmill running at equivalent heart rate and oxygen consumption, Bhattacharya et al. (1980), Journal of Applied Physiology 49(5):881-887

18. Cold water immersion and norepinephrine response, Johnson, Hayward & Jacobs et al. (1977), Plasma norepinephrine responses of man in cold water, Journal of Applied Physiology 43(2):216-220

19. Cold showers and sickness absence reduction, RCT (2016), Buijze et al., PLOS ONE

20. Cold water immersion substantially attenuating long-term gains in muscle mass and strength after resistance training, Roberts et al. (2015), The Journal of Physiology 593(18):4285-4301

21. Kuopio Ischaemic Heart Disease Risk Factor Study, sauna bathing and mortality, Laukkanen et al., JAMA Internal Medicine (2015)

24. Magnesium's role in enzymatic processes and sleep quality, The mechanisms of magnesium in sleep disorders, Nature and Science of Sleep

25. Red light therapy (photobiomodulation) mechanism and applications, Mechanisms and Mitochondrial Redox Signaling in Photobiomodulation, PMC5844808

26. Sleep expanding the brain's interstitial space and increasing glymphatic clearance of metabolic waste, including amyloid-beta (mouse model), Xie et al. (2013), Science 342:373-377

27. Sleep-active glymphatic clearance of amyloid-beta and tau to plasma validated in a human trial, Nature Communications (2026)

28. Skeletal-muscle contraction during exercise increasing lymph flow from human muscle (measured by scintigraphy), alongside intrinsic contraction of the collecting lymphatic vessels, Lymph flow dynamics in exercising human skeletal muscle detected by scintigraphy

29. Exercise activating the musculoskeletal system to increase lymph flow, with deep diaphragmatic breathing enhancing lymphatic return, Supportive Care in Cancer (2025)

1. Liquid laundry detergent water content, typically 60-90% by weight depending on concentration, Liquid laundry detergent compositions with silicone antifoam agent, U.S. Patent 5,288,431

2. Average plastic content of a passenger vehicle, roughly 151 kg as of 2016, up from 8 kg in 1960, Plastics makers plot the future of the car, C&EN

3. Single-use and packaging plastics as a share of global production, OECD Global Plastics Outlook

4. Recycled polypropylene fiber, CO2 emissions reduction vs. virgin PP, life cycle assessment, recycled PP fibre in concrete

5. Plastic recycling and occupational health risk from contaminant exposure, Cook, Derks & Velis, systematic scoping review

6. Only ~9% of all plastic ever produced has been recycled, Our World in Data / OECD

7. Polyethylene biodegradation by waxworm gut bacteria, Environmental Science & Technology (2014)

8. Plastic-degrading enzymes in waxworm saliva; termites as plastivore insects, comprehensive review, insect larvae and plastic degradation (2024)

9. An estimated 4.8-12.7 million metric tons of plastic entering the ocean from land-based sources every year, Jambeck et al. (2015), Science 347(6223):768-771

10. Food-grade silicone rated to roughly 220°C/428°F, with chemical migration from baking moulds rising sharply above 150°C, Meuwly et al. (2005), Heat stability and migration from silicone baking moulds, Mitteilungen aus Lebensmitteluntersuchung und Hygiene 96

11. Latex allergy prevalence in the general population averaging around 4.3% worldwide, Wu et al. (2016), Current prevalence rate of latex allergy: why it remains a problem?, Journal of Occupational Health

12. Parchment paper (silicone-coated) heat stability, with thermal decomposition products detected by TGA-FTIR analysis at 230°C, Parchment Paper and Silicone Baking Mat: Are They Safe to Use?, NETZSCH Analyzing & Testing

13. Aluminum foil migration into acidic/spicy foods exceeding WHO/EFSA tolerable weekly intake, International Journal of Electrochemical Science, 7 (2012) 4498-4509

14. PTFE pyrolysis above 260°C (536°F) releasing toxic fumes fatal to pet birds, with reported toxicosis cases at lower temperatures, Polytetrafluoroethylene, ScienceDirect Topics, citing peer-reviewed avian toxicology literature

15. PTFE-coated cookware, microplastic/nanoplastic release from a single scratch, Luo, Gibson, Chuah, Tang, Naidu & Fang, Science of The Total Environment (2022)

16. PFOA phased out of U.S. non-stick cookware manufacturing by 2015 under a voluntary EPA stewardship program, with major manufacturers meeting the target by 2013, Fact Sheet: 2010/2015 PFOA Stewardship Program, U.S. EPA

17. Melamine migration exceeding the specific migration limit in roughly a third of bamboo-fiber tableware tested, compared to under 3% for standard melamine tableware, Migration of Melamine and Its Derivatives from Melamine/Bamboo/Wheat Straw-Made Tableware, PMC10892781

18. EU ban on BPA and other hazardous bisphenols in food contact materials including epoxy can coatings, effective January 2025, Commission Regulation (EU) 2024/3190

19. FDA 21 CFR 175.300, food-safe resin coating standard, eCFR, Title 21, Section 175.300

20. Indoor air pollutant levels up to 100 times higher than outdoors, ranked among EPA's top-5 environmental health risks, Indoor Air Quality, PMC6125109

21. Gas stove/oven NO2 emissions vs. WHO indoor air guideline, Health Impacts of Gas Stoves, Rocky Mountain Institute

22. HEPA/carbon filter air purifiers reducing indoor NO2 by 36% and PM2.5 by 45% in homes with gas stove use, Effectiveness of HEPA/Carbon Filter Air Purifier in Reducing Indoor NO2 and PM2.5 in Homes with Gas Stove Use, PMC12736893

23. NASA Clean Air Study (1989), houseplants and VOC removal in sealed chamber conditions, B.C. Wolverton, NASA/ALCA; findings do not extrapolate to normally ventilated rooms, per Cummings & Waring (2019), Potted plants do not improve indoor air quality, Journal of Exposure Science & Environmental Epidemiology 30:253-261

24. White vinegar (acetic acid) demonstrating antimicrobial activity against various common indoor mold species on hard surfaces, though evidence for an exact species-kill percentage is not well established, An Evaluation of Antifungal Agents for the Treatment of Fungal Contamination in Indoor Air Environments, PMC4483703

25. Tea tree oil outperforming vinegar, alcohol, and commercial cleaners against mold, An Evaluation of Antifungal Agents for the Treatment of Fungal Contamination in Indoor Air Environments (2015)

26. Mold growth onset within 24-48 hours of moisture exposure, U.S. EPA, A Brief Guide to Mold, Moisture and Your Home

27. Indoor relative humidity recommendations to limit mold growth, U.S. EPA

28. DIY mold removal threshold (under 10 square feet), U.S. EPA, A Brief Guide to Mold, Moisture and Your Home

29. Gas and propane stoves emitting benzene during combustion, migrating through the home and at times exceeding health benchmarks for hours after use, Kashtan et al. (2023), Environmental Science & Technology 57:9653-9663

30. Gas stoves emitting nitrogen oxides and leaking unburned gas continuously even when switched off, Lebel et al. (2022), Environmental Science & Technology 56:2529-2539

31. Terpene-based cleaning products (limonene, pinene) reacting with indoor ozone to form formaldehyde and particulate matter, with secondary pollutants persisting for hours after a brief clean, Carslaw et al. (2022), Indoor Air

32. Melamine foam ("magic eraser") sponges shedding roughly 6.5 million microplastic fibres per gram of worn material, with denser sponges shedding less, Su et al. (2024), Environmental Science & Technology 58(24):10764

1. Typical healthy soil composition (45% mineral, 5% organic matter, 25% water, 25% air), Illinois Extension, Soil Basics

2. Soil pH scale and the 6.0-7.0 range for most vegetables where macro- and micronutrient availability is highest, HS1207: Soil pH Range for Optimum Commercial Vegetable Production, UF/IFAS Extension

3. Agricultural lime (calcium carbonate) neutralizing soil acidity through gradual carbonate-acidity reaction, Liming remediates soil acidity and improves crop yield and profitability: a meta-analysis, Frontiers in Agronomy (2023)

4. Plant macronutrients carbon, hydrogen, and oxygen sourced from air and water, providing the molecular framework for photosynthesis, The essential nutrient elements in photosynthesis, Frontiers in Photobiology (2026)

5. USDA National Organic Program 90/120-day rule for raw manure and compost application, USDA Agricultural Marketing Service

6. Garden lime application limited to roughly 5 pounds per 100 square feet per application for gardens, trees, and shrubs to avoid damaging existing plantings, Timing of Lime and Fertilizer Applications, UMass Amherst Center for Agriculture, Food, and the Environment

7. Compost carbon-to-nitrogen ratio, targeting roughly 25-30:1 by weight, typically achieved with 2-4 parts browns to 1 part greens by volume, Compost Chemistry, Cornell Waste Management Institute

8. Hot composting temperature range (55-70°C) and finished compost timeline, eOrganic, Composting to Reduce Weed Seeds and Plant Pathogens

9. EPA-specified compost conditions for pathogen reduction, minimum 40°C for five days with temperatures exceeding 55°C for at least four hours during that period, Compost Physics, Cornell Waste Management Institute

10. Vermicomposting worm (Eisenia fetida) tolerating temperatures from roughly 10-50°C, with activity inhibited above 50°C, Evaluation of temperature on the biological activities and fertility potential during vermicomposting of pig manure employing Eisenia fetida

11. Deep, infrequent watering encouraging deeper root development compared to shallow frequent irrigation, SL533/SS748: Improving Turfgrass Health: Proper Irrigation Techniques, UF/IFAS Extension

12. Soil testing sampling protocol using composite samples from 15-20 cores across multiple points, SL454/SS667: Soil Sampling Procedures, UF/IFAS Extension

13. Compost suppression of soil-borne plant diseases, and the biological basis shown by loss of suppressiveness after sterilisation, Noble & Coventry (2005), Biocontrol Science and Technology 15(1)

14. Review of compost disease-suppression mechanisms and the smaller, more variable effect in field soil versus container media, Mehta et al. (2014), Waste Management 34:607-622

15. Vermicompost humic substances and plant-growth-regulating compounds that stimulate growth beyond nutrient supply, Arancon et al. (2006), European Journal of Soil Biology 42:S65-S69

16. Meta-analysis of vermicompost effects on plant growth, with the strongest response at roughly 30-50% of soil volume, Blouin et al. (2019), Agronomy for Sustainable Development 39

17. Straw and organic mulch reducing soil water evaporation by roughly a third and moderating soil temperature, Mulching as a Sustainable Water and Soil Saving Practice in Agriculture: A Review, Agronomy 12(8):1881

18. Meta-analysis of mulching effects on crop yield and water-use efficiency across 74 studies, Soil mulching enhances yields and water and nitrogen use efficiencies: a meta-analysis, Scientific Reports 5:16210

1. FDA food contact approval routes (21 CFR listing, GRAS, Threshold of Regulation, Food Contact Notification), U.S. Food and Drug Administration

2. EFSA 2023 re-evaluation of BPA, tolerable daily intake reduced roughly 20,000-fold to 0.2 ng/kg body weight per day, Re-evaluation of the risks to public health related to the presence of bisphenol A (BPA) in foodstuffs, EFSA Journal (2023)

3. FDA's current position that BPA is safe at current dietary exposure levels, U.S. FDA, Bisphenol A (BPA): Use in Food Contact Application

4. Slow cooker liners typically made of low-density polyethylene, rated safe for moist heat up to around 100°C but not for dry or direct high heat, Rice cooker liner, U.S. Patent Application US20060266753A1

5. EU BPA restrictions in food contact materials, enacted 2024, Eurofins, Bisphenol A and Related Compounds

6. Coffee pod brewing typically forcing water at around 90°C through the pod at a nominal pressure for espresso-style machines, lower for standard pod brewers, Espresso coffee machine, U.S. Patent 8,850,959

7. Coffee pod micro/nanoplastic release study, Al-Mansoori, Harrad & Abdallah (2025), Science of the Total Environment 996:180188

8. Estrogenic chemicals detected in capsule coffee, Sakaki et al. (2020), Toxicology Reports 7:1020-1024

9. PFOA and related PFAS detected migrating from microwave popcorn bag coatings, High-Resolution Mass Spectrometry for Identification, Quantification, and Risk Assessment of 40 PFAS Migrating from Microwave Popcorn Bags, PMC12073814

10. FDA prohibition of three perfluoroalkyl ethyl food-contact substances, effective January 2016, Federal Register, Indirect Food Additives: Paper and Paperboard Components

11. PFAS class comprising over 12,000 compounds, USGS, cited in ScienceDirect review (2025)

12. Chemical migration from plastic containers increasing markedly above roughly 70°C as heat accelerates diffusion out of the polymer, A simulation study on the temperature-dependent release of endocrine-disrupting chemicals from polypropylene and polystyrene containers, Scientific Reports (2025)

13. PTFE pyrolysis above 260°C releasing fumes causing polymer fume fever in humans and lethal to birds, with toxicosis cases reported at lower temperatures, Polytetrafluoroethylene, ScienceDirect Topics, citing peer-reviewed toxicology literature

14. Empty non-stick pan reaching 260°C within minutes on high heat, Poison Control, Protect Yourself from Teflon Flu

15. PTFE-coated cookware, microplastic/nanoplastic release from a single scratch, Luo, Gibson, Chuah, Tang, Naidu & Fang, Science of The Total Environment (2022)

16. PFOA links to kidney/testicular cancer, thyroid disease, immune effects, C8 Science Panel findings

17. Approximately 80% of historical global perfluorocarboxylate emissions attributed to fluoropolymer manufacture and use, Prevedouros et al. (2006), cited in ATSDR Toxicological Profile for Perfluoroalkyls, Chapter 5

18. Ceramic non-stick coatings testing negative for the 96 PFAS screened, unlike a PTFE pan that contained measurable PFOA despite a "PFOA-free" claim, You Can't Always Trust Claims on 'Non-Toxic' Cookware, Consumer Reports

19. PBDE phase-out in the US: penta- and octaBDE discontinued 2004, decaBDE phased out by 2013, with state-level bans in California and Washington, Polybrominated Diphenyl Ethers (PBDEs), U.S. EPA

20. California TB117-2013 standard and shift toward non-chemical fire resistance, Home Furnishings Association, What is TB117-2013?

21. NIOSH on diisocyanates and occupational asthma, Preventing Asthma and Death from Diisocyanate Exposure, NIOSH Publication No. 96-111

22. CDC National Biomonitoring Program, PFAS detected in nearly all Americans tested, Fast Facts: PFAS in the U.S. Population, ATSDR/CDC

23. IFRA voluntary list of fragrance materials, IFRA Standards, International Fragrance Association

24. FDA sunscreen UV filter GRASE status (zinc oxide, titanium dioxide only); monograph last substantively updated 1999, Questions and Answers: FDA Posts Deemed Final Order and Proposed Order for Over-the-Counter Sunscreen, U.S. FDA

25. FDA-funded sunscreen ingredient absorption study, Matta et al., JAMA (2019)

26. PERC usage share among US dry cleaners; EPA/California carcinogen classifications; California phase-out by 2023, Perchloroethylene and Dry Cleaning; California Air Resources Board

27. FDA ban on triclosan and 18 other antimicrobials in consumer hand soap, September 2016, Consumer Antiseptic Wash Final Rule Questions and Answers, U.S. FDA

28. FDA ban on BPA in baby bottles and sippy cups, July 2012, U.S. FDA

29. Phthalates leaching from PVC into aquatic environments, with desorption half-lives estimated at over 500 years, Henkel, Hüffer & Hofmann (2022), Environmental Science & Technology 56(20):14507-14516

30. Ecology Center garden hose testing, lead/BPA/phthalates in hose water, Ecology Center, Garden Hose Study 2016

31. NSF/ANSI water treatment standards 42, 53, 58, 61, and 401, NSF International

32. Microwave heating of plastic containers releasing up to millions of microplastic and billions of nanoplastic particles per square centimetre within minutes, more than refrigeration or storage, Hussain et al. (2023), Environmental Science & Technology 57(26):9782-9792

33. Adolescents switching to personal-care products labelled free of phthalates, parabens, triclosan, and benzophenone-3 for three days showed significant drops in urinary levels of those chemicals (monoethyl phthalate down 27.4%), Harley et al. (2016), Environmental Health Perspectives 124(10):1600-1607

1. Lead solder in plumbing used until 1986, making homes built before then more likely to have lead-containing plumbing, Guidelines for Canadian Drinking Water Quality: Guideline Technical Document - Lead, Health Canada

2. EPA Maximum Contaminant Level Goal for lead set at zero, National Primary Drinking Water Regulations, U.S. EPA

3. EPA Maximum Contaminant Level for arsenic, 10 ppb, National Primary Drinking Water Regulations, U.S. EPA

4. EPA regulation of total chromium (MCL 0.1 mg/L) without a separate federal hexavalent chromium standard, Chromium in Drinking Water, U.S. EPA

5. EPA Maximum Contaminant Level for nitrates, 10 mg/L, Chemical Contaminant Rules, U.S. EPA

6. EPA enforceable limits for six PFAS chemicals in drinking water, finalized 2024, U.S. EPA, PFAS National Primary Drinking Water Regulation

7. Partial rollback of PFAS drinking water regulations, May 2025, American Water Works Association; U.S. EPA, Proposed PFAS Rescission Rule

8. Trihalomethanes and haloacetic acids as the only 11 of over 600 identified disinfection byproducts that are federally regulated, Analysis of Cumulative Cancer Risk Associated with Disinfection Byproducts in United States Drinking Water, PMC7142415

9. EPA regulating the HAA5 group of five haloacetic acids (MCL 60 µg/L) while related haloacetic acids remain unmonitored, Disinfectants and Disinfection Byproducts Rules (Stage 1 and Stage 2), U.S. EPA

10. Catalytic carbon filtration removing chloramines through catalytic breakdown to chloride and nitrogen, more effectively than standard activated carbon, Catalytic destruction of chloramine to nitrogen using chlorination and activated carbon, PubMed 18536485; Chloramine Fact Sheet, Water Quality Association

11. Community water fluoridation preventing at least 25% of tooth decay, ranked among the ten great public health achievements of the 20th century by the CDC, Community Water Fluoridation, American Public Health Association, citing CDC

12. August 2024 National Toxicology Program systematic review on fluoride exposure and children's IQ, NTP Monograph on the State of the Science Concerning Fluoride Exposure and Neurodevelopment and Cognition, National Toxicology Program

13. September 2024 U.S. District Court ruling on fluoride and unreasonable risk, Food & Water Watch v. EPA, Bergeson & Campbell, P.C.

14. May 2026 Ninth Circuit Court of Appeals ruling vacating the district court fluoride decision, E&E News; Bergeson & Campbell, P.C.

15. EPA's accelerated fluoride science review under the Safe Drinking Water Act, U.S. EPA, Fluoride in Drinking Water

16. EPA Maximum Contaminant Level for asbestos, 7 million fibers per liter (longer than 10 micrometers), with public notification required if exceeded, Asbestos Toxicity: U.S. Standards and Regulations, ATSDR

17. Health Canada and WHO concluding there is no consistent, convincing evidence that ingested asbestos is hazardous, Guidelines for Canadian Drinking Water Quality: Guideline Technical Document - Asbestos, Health Canada

18. April 2026 EPA Sixth Contaminant Candidate List, first-time inclusion of microplastics, U.S. EPA News Release

19. EPA human health benchmarks for 374 pharmaceuticals released alongside the draft sixth Contaminant Candidate List, EPA Takes Bold Action to Ensure Drinking Water is Safe from Microplastics, Pharmaceuticals, and Potential Hidden Contaminants, U.S. EPA

20. Compost addition reducing soil lead concentration in Swiss chard and carrots, Kansas State University Agronomy eUpdates, urban garden lead study (2010)

21. Cornell Waste Management Institute guidance on least-suitable crops for lead-contaminated soil, Soil Contaminants and Best Practices for Healthy Gardens, Cornell Waste Management Institute

22. Reverse osmosis PFAS removal effectiveness (95-99%+), Reducing PFAS in Drinking Water with Treatment Technologies, U.S. EPA

23. NSF/ANSI certification standards for filtration (53 for lead, P473 for PFAS, 244 for microplastics, 58 for reverse osmosis), NSF Standards for Water Treatment Systems, NSF International

24. Standard activated carbon filter (NSF/ANSI 42/53) limited effectiveness against fluoride and radionuclides, which require reverse osmosis (NSF/ANSI 58) for reliable reduction, NSF Standards for Water Treatment Systems, NSF International

25. Lead accumulating in residential plumbing and hot water tanks above distribution-system levels, supporting use of cold water for consumption, Modeling lead concentration in residential plumbing pipes and hot water tanks (2018), PubMed 29660725

26. Point-of-use filter performance for PFAS, with near-complete removal by reverse osmosis and two-stage systems and inconsistent results from activated-carbon pitchers and faucet filters, Herkert et al. (2020), Environmental Science & Technology Letters

1. Pre-1978 lead paint as a strong predictor of elevated soil lead near building foundations, Spatial Analysis and Lead-Risk Assessment of Philadelphia, USA, PMC8934574

2. EPA residential soil lead screening level lowered from 400 ppm to 200 ppm, effective January 17, 2024, U.S. EPA News Release; Environmental Standards, Inc.

3. Standard soil tests excluding PFAS, requiring specialized methods such as EPA Method 1633, Home Gardening: PFAS Contamination in Agriculture, Michigan State University Extension

4. USDA organic certification requiring organic seeds and planting stock when available, prohibiting synthetic pesticides and fertilizers, Organic Standards, USDA Agricultural Marketing Service

5. Neonicotinoid seed and plant treatments moving systemically through plant tissue, including pollen, nectar, and guttation fluids, Trends in neonicotinoid pesticide residues in food and water in the United States, 1999-2015, PMC6330495

6. Carbon filtration removing chlorine and chloramines but not reliably removing PFAS, Reducing PFAS in Drinking Water with Treatment Technologies, U.S. EPA

7. Raised bed soil depth requirements by crop, roughly 8 inches for leafy greens, beans, and cucumbers, and 12-24 inches for peppers, tomatoes, squash, and other deep-rooted crops, Growing Vegetables in Raised Beds, University of Maryland Extension

8. Glass as chemically stable and largely non-reactive, with its silicate network highly resistant to acidic conditions in particular, Comparative study of the structure and durability of commercial silicate glasses for food consumption and cosmetic packaging, npj Materials Degradation (2024)

9. Polycarbonate manufactured using BPA as the primary monomer, Migration of Chemical Compounds from Packaging Materials into Packaged Foods, PMC11475518

10. Frozen produce retaining the same inorganic contamination profile as fresh produce, with dried products showing the highest concentrations of all forms studied, Concentration of cadmium and lead in vegetables and fruits, PMC8184968

11. Fermentation safety parameters: adequate salt concentration, submersion below brine, anaerobic low-pH environment, Fermenting, National Center for Home Food Preservation, University of Georgia

12. Drying temperature and heat-sensitive nutrient retention, with vitamin C and polyphenols best preserved at roughly 50-60°C rather than higher heat, Thermal Degradation of Bioactive Compounds during Drying Process of Horticultural and Agronomic Products: A Comprehensive Overview, Agronomy 13(6):1580

13. Plant uptake of lead typically very low, with produce contamination driven mainly by soil-particle adhesion (exceptions: low leafy crops and root crops such as carrot), Brown et al. (2016), Journal of Environmental Quality

14. Field study: peeling reduced radish lead by about half and removing surface dust cut lead in leafy vegetables by 40-50%, Attanayake et al. (2021), ACS Agricultural Science & Technology 1(3):173-181

15. Urban community-garden exposure modelling indicating fruiting vegetables carry lower lead risk than leafy and root crops, and washing and peeling help, Spliethoff et al. (2016), Environmental Geochemistry and Health, PMC4940361

1. EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR5), 2023–24, U.S. EPA, UCMR5

2. PFAS National Primary Drinking Water Regulation, EPA 815-F-24-003, U.S. EPA, PFAS Drinking Water Regulation

3. EWG PFAS Tap Water Database, ewg.org/tapwater

4. Health Canada PFAS National Assessment, 2023, State of Per- and Polyfluoroalkyl Substances (PFAS) Report, Government of Canada

5. USGS National Water Quality Assessment (NAWQA), groundwater nitrate sampling, 2022, U.S. Geological Survey, NAWQA

6. EPA Safe Drinking Water Information System (SDWIS) violation records, 2019–23, Safe Drinking Water Information System, U.S. EPA

7. EWG Nitrate Pollution of Drinking Water investigation, 2020, Nitrate Pollution of Drinking Water for More Than 20 Million Americans Is Getting Worse, EWG

8. Agriculture and Agri-Food Canada nutrient loading and Prairie risk assessment, 2021, Watershed Evaluation of Beneficial Management Practices, Agriculture and Agri-Food Canada

9. EPA Toxics Release Inventory (TRI), metal releases per capita, 2022, U.S. EPA, TRI Program

10. USGS groundwater arsenic mapping, Arsenic and Drinking Water, U.S. Geological Survey

11. CDC NHANES blood lead data, National Health and Nutrition Examination Survey, CDC

12. CDC NIOSH Adult Blood Lead Epidemiology and Surveillance (ABLES), 2023, Adult Blood Lead Epidemiology and Surveillance, CDC/NIOSH

13. Health Canada Canadian Health Measures Survey (CHMS) biomonitoring, Human Biomonitoring of Environmental Chemicals, Health Canada

14. ECCC National Pollutant Release Inventory (NPRI), National Pollutant Release Inventory, Government of Canada

15. EPA Air Quality System (AQS), PM2.5 design values and ozone data, 2021–23, U.S. EPA, AQS

16. American Lung Association, State of the Air 2024, American Lung Association

17. Health Canada Air Quality Health Index (AQHI) annual summaries, Air Quality Health Index, Government of Canada

18. ECCC National Air Pollution Surveillance (NAPS) program, National Air Pollution Surveillance Program, Government of Canada

19. Canadian Environmental Sustainability Indicators (CESI), PM2.5 data, 2023, Air quality, Government of Canada

20. USGS NAWQA pesticide stream detection frequency, 2021, Pesticide National Synthesis Project, U.S. Geological Survey

21. Agricultural pesticide use estimates compiled from USDA survey data, Pesticide National Synthesis Project, U.S. Geological Survey

22. California Department of Pesticide Regulation, 2022 Pesticide Use Report, CDPR

23. Health Canada Pest Management Regulatory Agency (PMRA) sales data, Pesticides and Pest Management, Health Canada

24. Wetherbee, G., Baldwin, A. & Ranville, J. (2019). It Is Raining Plastic. USGS Open-File Report 2019-1048, USGS

25. International Joint Commission / USGS Great Lakes microplastics monitoring, 2022–23, Developing frameworks for monitoring and assessing the ecological risk of microplastics in the Laurentian Great Lakes, International Joint Commission

26. McIlwraith, H.K., Hataley, E.K. & Rochman, C.M. (2023). Towards a management strategy for microplastic pollution in the Laurentian Great Lakes-monitoring (part 1). Canadian Journal of Fisheries and Aquatic Sciences, 80(10)., doi.org/10.1139/cjfas-2023-0022

27. NOAA Marine Debris Program, NOAA

28. ECCC Science Assessment of Plastic Pollution, 2020, Science assessment of plastic pollution, Government of Canada

29. EPA National Listing of Fish Advisories, 2022, National Listing of Fish Advisories Technical Maps, U.S. EPA

30. USGS streambed sediment PCB concentration data, Water-Quality Benchmarks for Contaminants, U.S. Geological Survey

31. AMAP Assessment 2020: Persistent Organic Pollutants in the Arctic, Assessments, Arctic Monitoring and Assessment Programme (Arctic Council)

32. Donaldson, S.G. et al. (2010). Environmental contaminants and human health in the Canadian Arctic. Science of the Total Environment, 408(25), 5165–5234., doi.org/10.1016/j.scitotenv.2010.04.059

33. EPA 7th Drinking Water Infrastructure Needs Survey and Assessment (DWINSA), 2023. EPA 816-R-23-005, U.S. EPA, DWINSA

34. NRDC, Lead Service Line Analysis, 2024, Finding Lead Water Pipes: New NRDC Map Shows the Hot Spots in Every State

35. Environmental Defense Fund, city-level lead service line data, Top 10 cities with the most lead pipes, EDF

36. EPA Enforcement and Compliance History Online (ECHO), SDWIS health-based violation rates, 2019–23, U.S. EPA, ECHO

37. Public Health Agency of Canada, Boil Water Advisories surveillance indicator, 2022–23, Boil water advisories, Government of Canada

38. Indigenous Services Canada, long-term drinking water advisory data, Number of long-term drinking water advisories affecting First Nations water systems, Government of Canada

39. EPA Map of Radon Zones; state radon programme averages, The EPA Map of Radon Zones, U.S. EPA

40. Evict Radon National Study, 2024, 2024 Cross-Canada Survey of Radon Exposure in the Residential Buildings of Urban and Rural Communities

41. Health Canada Cross-Canada Radon Survey, 2012, updated 2024, Cross-Canada Survey of Radon Concentrations in Homes, Health Canada

42. CAREX Canada radon exposure profile, CAREX Canada

43. USGS Geologic Radon Potential Map, Geologic Radon Potential Map of the United States, U.S. Geological Survey

44. Lanphear, B.P. et al. (2018). Low-level lead exposure and mortality in US adults. The Lancet Public Health, 3(4), e177–e184., doi.org/10.1016/S2468-2667(18)30025-2

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47. Fenton, S.E. et al. (2021). Per- and Polyfluoroalkyl Substance Toxicity and Human Health Review: Current State of Knowledge and Strategies for Informing Future Research. Environmental Toxicology and Chemistry, 40(3), 606-630., doi.org/10.1002/etc.4890

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49. Rochman, C.M. et al. (2019). Rethinking Microplastics as a Diverse Contaminant Suite. Environmental Toxicology and Chemistry, 38(4), 703–711., doi.org/10.1002/etc.4371

50. Woodcock, B.A. et al. (2017). Country-specific effects of neonicotinoid pesticides on honey bees and wild bees. Science, 356(6345), 1393–1395., doi.org/10.1126/science.aaa1190

51. U.S. EPA (2003). Framework for Cumulative Risk Assessment. EPA 600-P-02-001F., Framework for Cumulative Risk Assessment, U.S. EPA

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3. ASPCA Animal Poison Control Center, Toxic and Non-Toxic Plant Database (veterinary clinical authority), aspca.org/toxic-and-non-toxic-plants

4. Merck Veterinary Manual, Houseplants and Ornamentals Toxic to Animals, merckvetmanual.com/houseplants-ornamentals-toxic

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6. Royal Botanic Gardens, Kew, Plants of the World Online (taxonomic database built on WCVP; ref. 5), powo.science.kew.org

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12. Litterick, A. et al. (2025). How safe are peat-free growing media? Plants, People, Planet, 7(6), 1684–1699., doi.org/10.1002/ppp3.70027

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14. Indole-3-butyric acid (IBA), the auxin used as the active ingredient in commercial rooting compounds, promoting adventitious root formation in cuttings, Roles for IBA-derived auxin in plant development, Journal of Experimental Botany 69(2)

15. Dose dependence of auxin on rooting, with excessive concentrations able to inhibit adventitious root initiation, Exogenous hormone supplementation and adventitious root formation in woody plants, PMC9513251

16. Azadirachtin as the principal insecticidal compound of neem, acting as an antifeedant and insect growth regulator, with neem oil effective against soft-bodied insects and mites, Progress on Azadirachta indica Based Biopesticides, Frontiers in Plant Science (2017)

17. Azadirachtin growth-regulator mode of action, disrupting the moulting hormones that control insect development, Azadirachtin, a naturally occurring insect growth regulator, Proceedings: Animal Sciences