The relationship between intestinal health and probiotics is relatively close, mainly in terms of disease resistance, nutrition and digestive function. 1. Disease resistance: Probiotics in the intestinal tract can prevent the growth and reproduction of pathogenic bacteria through competitive inhibition, and are part of the body’s first line of defense against foreign germs. 2. Nutrition: Probiotics can produce vitamin K, B1, B2, B6, etc., as well as short-chain fatty acids, antioxidants, amino acids and other nutrients that can be absorbed by the human body, which has a good nutritional support for human intestinal health. 3. Digestive function: Probiotics can produce some digestive enzymes that the human body itself lacks to help the human body digest some specific nutrients, such as Lactobacillus acidophilus can secrete lactase to digest lactose, so that the human body will not suffer from lactose intolerance. It is recommended to use the medication under the guidance of a doctor, not blindly self-medication, in order to avoid adverse effects.