Excellent product from a quality company. Betaine HCL is a supplement for stomach acid. Most people do not produce enough stomach acid (about 2,500 mg/meal). Thus, food does not dissolve properly in the stomach, leading to issues, food particles in the stool (undigested food), bacterial growth in the stomach (as there is no acid in the stomach, creating free space for growth that long-term can lead to cancer), the person loses weight, muscle, and mass (from malnutrition), we have continuous diarrhea, bacterial and fungal growth in the small intestine (from microorganisms that have not been killed by the acid - skin issues), etc. The biggest symptom is the constant lack of hunger (from the lack of acid in the stomach). Take 500-600 mg per meal and increase by 1 pill per meal per day until heartburn occurs. If heartburn occurs, reduce by 1 pill. Continue until the stomach can produce hydrochloric acid on its own. That is, until the normal function of the stomach is restored, at which point you will no longer need the supplement (the sense of hunger will have returned).