The main difference between yogurt and milk lies in the addition of lactic acid bacteria, so lactose in milk will be decomposed into lactic acid, and lactic acid and calcium are found to be most easily absorbed by the human body, so yogurt is very suitable for adolescents who are developing in adolescence or women who are prone to osteoporosis in menopause. In addition, it creates an acidic environment in the gastrointestinal tract, which can also help iron absorption.