Di-Acid Stim contains betaine hydrochloride, glutamic acid hydrochloride, pepsin, and the proteolytic enzyme papain, all of which aid the first phase of digestion that occurs in the stomach. The second phase of digestion, occurring in the duodenum, is aided by Di-Acid Stim's additional ingredients: pancreatin, pancrelipase, ox bile extract, bromelain and amylase. This combination assures that both phases of digestion are addressed by the natural ingredients in the product.