When the food we eat is not properly digested and absorbed we can develop symptoms of nutritional deficiency. To use the phrase 'you are what you eat' is not strictly true; 'you are what you absorb' is probably more correct. A significant proportion of the nutrients in our diet never get absorbed into the body, but by maintaining a clean and healthy digestive system absorption of these nutrients can be improved! Pro-biotics are sometimes also known as intestinal flora or beneficial bacteria, some are resident in the digestive system and some just pass through, but they all have a vital role to play in the digestive tract. Pro-biotics have many functions, including helping to produce some B vitamins, supporting the immune system, digesting food and promoting the proper health of the digestive system. Acidophilus is a practical, dairy free (great to help avoid lactose), no nonsense 40 million bacteria per capsule, Lactobacillus Acidophilus product. Active ingredients per capsule: Lactobacillus Acidophilus 40 million