Water & Hydration

7 topics, A–Z

• Alkaline Water 1 article Blood pH is tightly regulated, and the few small trials of alkaline water are short and inconsistent. What the research actually shows, and what it does not.
• Bottled Water 1 article In the U.S. both tap and bottled water are regulated, and bottled is not automatically safer. Where tap falls short, what bottled adds, and when to choose it.
• Hydration 1 article Most healthy adults need about 2.7–3.7 liters of total water a day, a fifth of it from food. What changes your number, and when more water helps or hurts.
• Reusable Water Bottles 1 article Uncoated stainless steel and glass are the lowest-concern bottles; plastics can shed chemicals and particles with heat and wear. How to choose and clean one.
• Reverse Osmosis Water 1 article RO and distilled water are low in minerals, but food supplies most of them. What the evidence says, who should pay attention, and the wastewater trade-off.
• Shower Filters 1 article Shower filters can cut chlorine, but no trial shows they improve skin or hair. What they do, what hard water does, and where the evidence stops.
• Well Water Safety 1 article Private wells are not regulated, so testing is up to you. What to test every year, what to add for your region, and how to treat what you find.