Environment · Brain health technique
Reverse Osmosis (RO) Filtration
Evidence grade: Essential
Under-sink or whole-home RO systems with carbon pre-filter.
- Practice
- Environment
- Principle
- Protection
- Tactic
- Water Purity & Handling
- Evidence grade
- Essential
- Strength of evidence
- High
How to practice Reverse Osmosis (RO) Filtration
Use under-sink RO for drinking and cooking water, especially in areas with PFAS, heavy metals, or nitrate concerns. Re-mineralize water if taste or hardness is an issue. Replace filters on schedule (typically every 6–12 months). RO is most valuable for ingestion; whole-home RO is rarely necessary.
The evidence behind Reverse Osmosis (RO) Filtration
Removes heavy metals (lead, mercury, arsenic), PFAS, nitrates, and microplastics, neurotoxic and endocrine-disruptive compounds. Mechanistic and epidemiologic evidence link lower contaminant levels to reduced vascular and cognitive risk. Safe and well-established for residential use.
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