Probiotics are nothing but a number of beneficial bacteria consumed in order to improve the overall condition and the health of the body. The most famous representatives are: Lactobacillus and Bifidobacterium. And what positives can we expect from supplementation of these bacteria? Reduction of acne caused by bacteria from the group Candida and reduce diarrhea, as well as reduce of symptoms of gastroenteritis. Probiotic supplementation is also an effective protection of the digestive tract during antibiotic treatment and improvement of lactose tolerance. As shown in several studies, they also reveal anti-tumor activity, especially in the case of colon cancer. Regular use of probiotics reduces cholesterol level. Moreover, they have a positive effect on the immune system functions effectively reducing any kind of inflammation.