1, maintain normal intestinal function.
Intestine is the largest immune organ and microecosystem of human body. The human body slowly interacts with the outside world through the gastrointestinal mucosa, and through its growth and various metabolic effects, it promotes the normalization of intestinal flora, inhibits the production of spoilage substances in the intestine, and maintains the normal operation of intestinal function.
2. Relieve the symptoms of lactose intolerance and promote digestion and absorption.
Lactose intolerance refers to the lack of enzymes that metabolize lactose. After ingesting dairy products, there are adverse reactions such as abdominal distension and abdominal pain. The lactase activity of 75% adults in the world shows signs of weakening, and some Asian countries exceed 90%. It is found that lactic acid bacteria have galactosidase activity, which can obviously reduce lactose concentration and produce lactic acid, which is beneficial to human digestion and absorption.
3. Enhance human immunity
Probiotics enter the intestine, on the one hand, they can colonize in the intestine and maintain the balance of intestinal microbial flora; On the other hand, probiotics can directly act on the host's immune system, induce intestinal immunity, stimulate immune organs such as thymus and spleen, promote macrophage activity, and exert specific immune activity by enhancing the responsiveness of B and T lymphocytes to antigen stimulation, thus enhancing the immune function of the body.
4. Prevent cancer and inhibit tumor growth.
Probiotics can produce some metabolites that inhibit tumor growth, such as polysaccharide, bacteriocin, lactic acid and so on. By inhibiting the production of enzymes that transform carcinogens, they activate the immune system, especially the activities of macrophages, NK cells and B lymphocytes, inhibit cell mutation, and reduce the PH value in the intestine to stimulate intestinal peristalsis, so that pathogenic toxins and carcinogens in the intestine are excluded from the body, thus reducing the possibility of carcinogenesis.
Step 5 Alleviate allergic reactions
Studies have found that the more probiotics in the intestines of normal people, the less likely they are to suffer from allergic diseases. Probiotics can induce T cells to produce a large amount of IL- 12, inhibit the production of Ig E and effectively prevent allergies.
6. Reduce serum cholesterol
Probiotics mainly reduce cholesterol content through assimilation and inhibit the activity of cholesterol synthase (3- hydroxy -3- methylglutaric acid CoA reductase). Under the action of probiotics bile salt hydrolase, bile salts hydrolyzed in small intestine can precipitate with cholesterol in food, which reduces the absorption of cholesterol by human body and promotes excretion from feces.
7. Effect of probiotics on obesity
Intestinal flora imbalance plays a very important role in the occurrence and development of obesity. A large number of experiments have confirmed that obesity can be effectively prevented by ingesting probiotics.
① Restrain appetite and increase satiety: Probiotics can stimulate the release of satiety factors such as CCK, GLP- 1 and reduce the secretion of gastric growth-promoting hormone, thus reducing food intake, weight loss and fat accumulation. ② Lowering cholesterol: Probiotics reduce cholesterol absorption through assimilation and precipitation. ③ Regulation of intestinal flora: After probiotics enter the intestine, the unbalanced intestinal flora is normalized (the number of Firmicutes decreases and the number of Bacteroides increases), which reduces the permeability of intestinal epithelial cells, reduces the content of LPS in circulation, reduces inflammatory factors and further improves insulin sensitivity.
8. The study on the effect of probiotics on diabetes found that diabetic patients also had intestinal flora imbalance. Probiotics can attach to intestinal epithelial cells by regulating intestinal flora and beneficial bacteria. Probiotics absorb glucose into bacteria, reducing the absorption of the host, thus lowering the blood sugar level. In addition, as mentioned above, probiotics can reduce the concentration of LPS in circulation, alleviate inflammatory reaction, improve insulin sensitivity and improve insulin resistance, thus achieving the purpose of preventing diabetes.