Betaine hydrochloride was previously available as an over-the-counter (OTC) medicine to increase stomach acid in people with low stomach acid. But the US FDA banned its use in OTC products due to a lack of information about whether it is safe and effective.
Betaine hydrochloride is used for many conditions, including diarrhea, increasing stomach acid, and others, but there is no good scientific evidence to support any use.
Don't confuse betaine hydrochloride with betaine anhydrous.
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