Filter tap water to reduce exposure to chemical agents such as fluoride, and ideally consume hard water (rich in calcium and magnesium), which is beneficial for cardiac vitality.

noli's read

The idea of filtering water to limit exposure to pollutants is a sound precautionary reflex, but demonizing fluoride remains nuanced. Recent meta-analyses, notably one published in JAMA Pediatrics in 2025 and a 2026 report from the National Toxicology Program, link high fluoride exposure to risks regarding cognitive development or hormonal balance, but these effects are primarily observed beyond the regulatory thresholds for standard drinking water. Regarding hard water, science validates the value of mineral-rich water for heart health. A meta-analysis by Gianfredi et al. (2016), which aggregated observational studies, shows that water rich in calcium and magnesium is correlated with better cardiovascular support. However, this evidence remains observational in nature and does not establish a direct cause-and-effect link, due to a lack of randomized clinical trials. Thus, while drinking mineralized water is an excellent hydration choice, absolute filtration of fluoride is a matter of personal precaution rather than a scientifically established necessity for everyone.

the sources

1. 1NIH Office of Dietary Supplements 2026
2. 2Manson JE et al. 2019
3. 3Bhatt DL et al. 2019
4. 4Khan SU, Lone AN, Khan MS, et al. 2021
5. 5Liao Y, Xie B, Zhang H, et al. 2019
6. 6hubermanprotocols.com (fan reference guide)