Betaine is a vitamin-like substance naturally found in the body that assists with detoxification, liver function, and helps maintain fluid balance in cells. Betaine hydrochloride (HCL) on the other hand, is a modified version that's primary purpose is to restore stomach acid levels. Maintaining optimal stomach acid is crucial for the proper breakdown of food, nutrient uptake, and minimized risk of bloating. Stomach acid levels can decrease with age, due to infection, or as a result of the use of certain medications.