Innovative Quality Since 1932 Dietary Supplement 1 Daily Over 4 Billion** Microorganisms No Refrigeration Needed Clear Quality Discussion: KAL Shelf Stable Acidophilus contains over 4 billion ** viable organisms intended to provide nutritive support for the establishment and maintenance of favorable intestinal flora. A proprietary strain of L acidophilus is offered in a unique delivery system which helps to minimize the loss of the organisms at room temperature, as well as B. lactis (bifidum).**At time of manufacture.