The company first introduced its sweet acidophilus milk in 1976, and has since sold over 38 million gallons. Healthy acidophilus and bifidum cultures are found naturally in the body's digestive tract. Doctors recommend Purity's AB milk products because they replenish the body of natural microflora that are destroyed by processed foods and antibiotics, and because they provide additional health benefits not found in regular milk. Purity's new 0% Plus takes the healthy idea a step further by delivering these cultures in fat free milk.