Doctor's Best Betaine HCL, Pepsin and Gentian Bitters contains three nutritional factors that perform complementary functions designed to support the efficiency of the digestive process. Supplementing with Betane HCI may support the stomach's digestive capacity. Pepsin is an enzyme produced by the body to digest protein-containing foods in the stomach. Pepsin works in conjunction with stomach acid to support protein digestion. Gentian is an herb used to optimized the digestive capacity and tonify the digestive tract. Its bitter nature may help to stimulate the body's production of digestive enzymes.