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Atrophic Gastritis & Onsen | Chloride Springs to Stimulate Gastric Acid

Published May 6, 2026·1min read

Atrophic gastritis involves thinning of the gastric mucosa and reduced acid secretion. Japan's Ministry of the Environment recognises chloride spring water as having a drinking indication: chloride ions stimulate stomach cells to produce hydrochloric acid, compensating for the reduced digestive function.

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In atrophic gastritis, parietal cells decrease, leading to insufficient gastric acid. The chloride ions (Cl⁻) abundant in chloride springs stimulate parietal cells to produce hydrochloric acid, helping to restore digestive capacity. This is the opposite mechanism to acid reflux (where excess acid is the problem).

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Chloride Springs: Benefits, Indications & Recommended Onsen

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