B. Lactics Probitics Supplementation Benefits. Bifidobacterium Lactis is a very powerful transient probiotic bacteria. Scientific studies have proven that B. Lactis enhances immunity, fights tumor growth, improves digestion and can lower cholesterol. B. animalis/lactis inhabit the intestines & the colon in great numbers. Generally, their job is to break down body waste & aid in the absorption of various vitamins & minerals. Bifido Lactis is present in raw milk and is used as starter culture for cheese, cottage cheese and butter milk.