Bio or BA yogurt is made with different live cultures, called bifidus and acidophilus. It is often claimed that these particular bacteria aid digestion by supplementing the body's natural flora. When these bacteria are used as the starter for your own yogurt they will reproduce and make bio yogurt. Bio yogurt is not as sharp as ordinary yogurt, and has a milder, creamier flavor. All yogurts are easier to digest than plain milk, because of the action of the bacteria, and they are a good source of calcium and phosphorus, which are essential for strong teeth and bones. Yogurt is also said to be good for maintaining the general health of the skin and the digestive system, and yogurts that have soluble fiber added to them may help to lower the level of cholesterol in the blood.