Topic
Drinking Water
Drinking Water is a recurring research topic on Health Canon. This hub collects related explainers and protocols, newest first, each with evidence grades and practical decision frameworks.
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Environmental Health
NSF Water Filter Standards 42, 53, 58, and 401 Explained
Certification is claim-specific and model-specific: 42 is aesthetic, 53 health adsorption, 58 reverse osmosis, 401 emerging compounds.
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Environmental Health
Microplastics and Human Health: Exposure, Organ Evidence & What Actually Reduces Dose
Humans take in tens of thousands of plastic particles yearly from diet and air—and landmark studies have found plastics in blood, plaque, placenta, and brain tissue. Here is how to read the evidence without credit-card myths.
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Environmental Health
Fluoride in Drinking Water: Evidence on Caries Benefits, Policy Levels & Contested Risks
U.S. systems that fluoridate target 0.7 mg/L. CDC still cites about 25% fewer cavities—while NTP reports moderate confidence that higher fluoride associates with lower child IQ. Dose is the whole debate.
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Environmental Health
Community Water Fluoridation at 0.7 mg/L: Evidence, Policy, and Dose Context
CDC’s recommended 0.7 mg/L target, ~25% caries reduction framing, EPA’s 4.0 mg/L MCL vs 2.0 mg/L SMCL, and how to think about total intake.
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Hormones & Genes
Birth Control in Tap Water: Human Dose Bridge vs the Pill
Picograms and nanograms per day versus 20–35 µg ethinylestradiol—orders of magnitude matter.
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Hormones & Genes
Birth Control Hormones in Drinking Water: Dose, Ecology & Human Risk
EE2 and related estrogens in water explained with ng/L units — real fish ecology risk, orders-of-magnitude human dose bridge versus oral contraceptives, treatment fate, regulation, and proportionate mitigation.
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