Britain. A box of 30 bags of Lanqishi stomach nourishing probiotic powder is beneficial to human body. It is imported from England and is a brand of Schubert's Blue Flag Poetry. Probiotics have obvious clinical effects. They can produce some antibacterial substances in the intestine, such as acid and hydrogen peroxide, which can effectively prevent the growth of bacteria, regulate the immune system and improve the microecological balance of the body.