Section
Environmental Health
Dose-aware exposure science for modern life — citations first, slogans last.
Environmental health is the science of what gets into your body from air, water, food packaging, personal care, and buildings — and what that dose actually means. This section covers PFAS and forever chemicals, microplastics, endocrine-disrupting fragrances, mold and dampness, non-ionizing EMF, fluoride policy levels, hormones in drinking water, and water filtration including reverse osmosis. Every guide dual-sources contested claims, keeps units honest (ppt vs ppm, µT vs SAR), and separates ecological signals from human clinical risk when the dose bridge fails.
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Environmental Health
WHO Dampness and Mould Framework: Why Moisture Beats Spore Counts
No safe microbial threshold—fix water, then clean. IOM evidence ladder included.
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Environmental Health
Water Filtration & Reverse Osmosis: How to Choose by Contaminant, NSF Claim & Cost
The right filter is a claim matched to a lab result—not a marketing sticker. This guide maps microbes, metals, PFAS, nitrate, and chlorine to technologies, NSF standards, RO setup, and real maintenance.
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Environmental Health
Pinworm (Enterobius) and Soil-Transmitted Helminths: What Matters Where
U.S. households meet pinworm; global STH burden is a different map. Intensity drives morbidity.
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Environmental Health
PFAS Removal: Reverse Osmosis vs Activated Carbon Filters
GAC handles many long-chain PFAS until breakthrough; RO is the more consistent barrier for short- and long-chain compounds when certified and maintained.
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Environmental Health
PFAS Forever Chemicals: Complete Guide to Exposure, Health Evidence & Mitigation
EPA drinking-water MCLs are now 4.0 ppt for PFOA and PFOS. Here is how forever chemicals enter the body, what half-lives and biomonitoring tiers mean, and which filters actually work.
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Environmental Health
PFAS EPA MCLs Explained: What 4.0 ppt Means for Drinking Water
A units-first decode of EPA’s 2024 PFAS National Primary Drinking Water Regulation—MCL vs MCLG, Hazard Index math, and why 70 ppt is obsolete.
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Environmental Health
Human Parasites Guide: Global Burden, U.S. Spectrum, Diagnosis & Cleanses
Parasites are many diseases, not one cleanse target. Protozoa versus helminths, global STH burden versus U.S. shortlist, matched diagnostics and drugs, Toxoplasma pregnancy prevention, and why commercial cleanses fail.
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Environmental Health
Parasite Cleanse Myth vs Evidence-Based Medicine
Herbal multi-level marketing is not albendazole. Diagnosis first; prescription when infection is real.
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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
Mold & Damp Buildings: Health Evidence, Testing Limits & Remediation That Works
Dampness—not a magic spore number—is the risk signal. WHO and IOM link moldy buildings to respiratory disease; CDC does not recommend routine home mold testing. Fix water first.
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Environmental Health
Microplastics in Blood, Placenta, Plaque, and Brain: What Studies Show
Detection is no longer speculative—Leslie blood, Ragusa placenta, Marfella plaque, and Nihart brain findings—with hard limits on causation.
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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
ICNIRP Exposure Limits Explained: LF 2010 and RF 2020
Basic restrictions versus reference levels—and what the guidelines actually protect against.
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Environmental Health
IARC EMF Group 2B: What “Possibly Carcinogenic” Actually Means
Hazard identification is not a quantitative risk score—and 2B is not Group 1.
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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
Fish Feminization from EE2: Vitellogenin, Intersex, and Population Collapse
Whole-lake experiments prove ecological harm at low ng/L—without making your faucet a contraceptive.
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Environmental Health
Endocrine-Disrupting Fragrances: Phthalates, Musks, Labels & Avoidance That Works
“Fragrance” on a U.S. label can hide dozens of chemicals. DEP tracks perfume use; DEHP is a stronger anti-androgen from plastics—and 35% of people report health effects from fragranced products.
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Environmental Health
EMF Exposure Evidence Guide: ELF, RF, Limits & Practical Mitigation
Non-ionizing EMF explained with band, metric, and evidence grade on every claim — IARC 2B context, childhood leukemia bands, phone cancer cohorts, fertility dual-reports, EHS, FCC/ICNIRP limits, and distance-time-mode mitigation.
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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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Environmental Health
CIRS Evidence Grade vs Mainstream Mold Medicine
Damp buildings and respiratory risk are established. CIRS as a discrete diagnosis remains contested.
Frequently asked