Betaine hydrochloride

Betaine hydrochloride is an OTC supplement marketed for «low stomach acid» as a cause of bloating, post-meal fullness and belching. The actual evidence is limited: the pH study by Yago (Mol Pharm 2013) in 6 healthy volunteers shows brief local gastric acidification after drug-induced hypochlorhydria, but no clinical RCTs in functional dyspepsia with a symptom-relief endpoint exist. Per Rome IV 2016 and ACG 2017, functional dyspepsia is a diagnosis of exclusion after assessment of alarm symptoms and H. pylori testing (Maastricht VI 2022, AEG 2022). Standard care: H. pylori test-and-treat, empirical PPI for 4-8 weeks, prokinetic for post-prandial distress. The FDA in 1993 removed betaine HCl from the OTC monograph. AEMPS and AESAN treat the product as a complemento alimenticio without therapeutic indication. If betaine HCl was bought «for digestion», discuss symptoms with a gastroenterologist – prescribing a stomach-acid replacement blind, without workup, is not justified.

In GERD, betaine hydrochloride is CONTRAINDICATED. Betaine HCl briefly lowers gastric pH – exactly what aggravates reflux into the esophagus and worsens erosive esophagitis. The marketing idea «heartburn from low acid, add acid» contradicts physiology: in GERD, heartburn arises from acid content reflux into the esophagus and lower esophageal sphincter weakness, not from a hydrochloric acid deficit. ACG 2022 and NICE CG184 unambiguously recommend proton pump inhibitors (omeprazole, esomeprazole, pantoprazole) for GERD for 4-8 weeks with step-down. Betaine HCl is not mentioned as an option in these guidelines – the product is potentially harmful in an acid-related disease. If betaine HCl was bought «for heartburn», stop it immediately and discuss heartburn with a gastroenterologist or family doctor – confirmed GERD needs PPIs, not acidifiers.

Betaine hydrochloride is marketed as a «universal digestive fix for anyone with heartburn, belching and post-meal heaviness». This concept does not hold. In a subset of patients with true hypochlorhydria (atrophic gastritis after long H. pylori carriage, autoimmune gastritis with parietal cell antibodies, post-gastrectomy state) adding hydrochloric acid is also useless – the problem is not acid quantity at the moment but functional parietal-cell mass, and patients need replacement targeted to the specific deficit: vitamin B12 in intrinsic factor deficiency, iron in anemia, surveillance for metaplasia risk. In most people with «low acid» symptoms, objective pH measurement shows normal or elevated acidity. The marketing test «a spoon of apple cider vinegar provokes heartburn = hypochlorhydria diagnosis» has no diagnostic value. If betaine HCl was bought «for digestion», discuss symptoms with a gastroenterologist – the diagnosis of hypochlorhydria is made by specific tests (gastroscopy with biopsy, parietal cell antibodies, gastrin), not by the reaction to apple cider vinegar.