Unlike most probiotic products, Flora Immune does not need to be refrigerated. Most importantly, Flora Immune can be taken simultaneously with antibiotics, allowing you to maintain healthy intestinal flora. No other pro-biotic product allows you to do this. Flora Immune is not from a dairy source and is vegetarian grade. Flora Immune is known as a transient beneficial bacteria which supports the invaluable resident bacteria. The active ingredient, a beneficial bacterium known as sporogenes, only remains active for 72 hours, then passes completely through the bowel.