Alkaline water
The pH is not the point.
Hallstein sells artesian water advertised as zero microplastics, zero PFAS and pH 8.3 — “don’t change your life, just change your water.” Short answer: reviews find no good evidence that alkaline water improves health beyond a possible effect on reflux, and a lab test found bottled alkaline waters carry almost no alkali. Whether a bottle is free of microplastics or PFAS is a lab-testing question, not something an ad can settle.
How the evidence flows
Each claim (middle), the studies that tested it (left) — green found it, red found nothing — and the grade they add up to (right). Drawn from the same records as the grades below. Tap to open full size.
Alkaline water (Hallstein) · evidence checked 2026-10-27
What the research shows
Grades are calculated from the studies listed, by fixed rules.
- High-pH (alkaline) drinking water is better for your healthNo real evidence
Reviews find little beyond possible help with reflux, and no support for alkalizing the body, immunity or disease prevention. A lab test of bottled alkaline waters found the high pH carries almost no alkali.
- Narrative review, size not stated (2026) — secondary outcome: result not reported. Funder not checked. Not counted toward the grade.
- Narrative review, size not stated (2016) — secondary outcome: result not reported. Funder not checked. Not counted toward the grade.
- Lab (cell) study, size not stated (2024) — secondary outcome: result not reported. Funder not checked.
- Hallstein water: zero microplastics, zero PFAS, pH 8.3 — “don’t change your life, just change your water”No real evidence
The ad said “Don’t change your life, just change your water / zero microplastics / zero PFAS / 100% naturally filtered, no artifical treatment / 8.3 pH high alkalinity”
Hallstein Water · Facebook ad, seen Oct 2026
Whether a given bottle contains microplastics or PFAS is a testing question we cannot check from an ad; we found no published study of Hallstein. The pH is not a health benefit (above).