"Source Naturals' Life Flora is the most advanced and potent microflora product available. It was developed by Dr. Khem Shahani, a prominent flora researcher at the University of Nebraska. It contains two complementary forms of bifidus, DDS-1 acidophilus, Strepatococcus faecium and Lactobacillus casei. ""Friendly"" microflora supports human colon health by altering the microfloa ecology to inhibit undesirable flora and favor ""friendly"" flora. Acidophilus also manufactures some B-vitamins, especially folic acid. Life Flora's cells are specially protected before and after freeze-drying by a unique stabilizing process. Gelatin capsule contents are suitable for lacto-vegetarians."