Bifidobacterium animalis is a bacteria that naturally makes its home in the human body. It lives in the large intestines and is necessary for food digestion. The function of the bacteria deals with space and food consumption.
Gelatin, which is used in food and industry, is collagen that has been irreversibly hydrolyzed. Collagen also has many medical uses in treating complications of the bones and skin. The name collagen comes from the Greek ÎºÏÎ»Î»Î± (kolla), kÃ³lla  meaning , glue and -suffix, -Î³Î­Î½, gen denoting. producing
Collagen occurs throughout the body, but especially in the skin, bones, and connective tissues. Some types of collagen fibrils, gram-for-gram, are stronger than steel. Collagen production declines with age and exposure to factors such as smoking and UV light. Collagen can be used in collagen dressings, to attract new skin cells to wound sites. Cosmetic lotions that claim to increase collagen levels are unlikely to do so, as collagen molecules are too large to be absorbed through the skin.