Orthomol Immun pro contains a combination of the microorganisms Bifidobacterium lactis, Bifidobacterium infantis, Bifidobacterium longum, Lactobacillus Plantarum and Lactobacillus rhamnosus. Inulin is a carbohydrate that cannot be digested by humans and is extracted from chicory. Vitamin C, vitamin D, zinc, selenium, copper, folic acid, vitamin A (thiamine), vitamin B6 and vitamin B12 contribute to the normal function of the immune system (including the gut-associated immune system). Vitamin A (thiamine), vitamin B2 (riboflavin), biotin and niacin contribute to the maintenance of normal mucous membranes (including the intestinal mucous membrane). Vitamin C, vitamin E, vitamin B2 (riboflavin), zinc, selenium, copper, and manganese contribute to the protection of cells from oxidative stress.