How effective lactase is needs to be judged according to the disease and individual’s physical condition. Lactase is a digestive enzyme contained in breast milk or milk powder, which can digest lactose by breaking it down into galactose and glucose, thus providing energy for the body’s metabolism; it is also helpful for infants’ brain development; and it can be utilized by bifidobacteria in the intestinal tract to prevent constipation and diarrhea, etc. When there is a deficiency of lactase, it may cause the absorption and digestion of lactose to be impaired, resulting in abdominal pain, bloating, diarrhea and other indigestion symptoms. When lactase is deficient, it may lead to lactose absorption and digestion disorders such as abdominal pain, bloating, diarrhea and other indigestion symptoms. You can take lactase tablets or lactase-containing formulas after checking your blood and stool routine to rule out intestinal diseases. It is effective for lactase intolerance. It is effective in cases of lactase intolerance, but the exact effect needs to be judged according to the individual’s reaction. Therefore, it is not recommended to take lactase on your own, and should always be taken under a doctor’s supervision.