Filtered Water

Filtered water removes contaminants that accumulate in municipal and private water supplies, including PFAS (per- and polyfluoroalkyl substances), heavy metals, chlorine, and microplastics. The evidence for hydration as a health intervention is gold-standard: adequate water intake supports cognitive performance, kidney function, cardiovascular health, and thermoregulation. The case for filtration specifically rests on PFAS exposure data, the EPA set maximum contaminant levels for six PFAS in 2024 due to links with immune disruption, hormone interference, and increased cancer risk. Everyone benefits, but particularly those on private well water, those in older housing with lead pipes, or anyone in areas with documented PFAS contamination. Reverse osmosis removes the widest range of contaminants; activated carbon targets chlorine and some VOCs; basic filters vary widely. PGSS take: One of the highest-impact, lowest-cost interventions available, the infrastructure matters as much as any supplement you take.