"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 support 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."