Many things can throw off the delicate balance of flora in the intestines. Twinlab® Yeast Fighters is a concentrated mixture of specially prepared herbs that helps to maintain a healthy intestinal environment.* It contains the essential bacteria lactobacillus acidophilus, concentrated odorless garlic extract powder, natural caprylic acid, biotin, and a fiber blend of psyllium seed husks, guar gum, chitosan and apple pectin to support your digestive system.* Biotin is an essential water-soluble B vitamin. The name biotin is derived from the Greek word "life." Biotin supports healthy enzyme function and contributes to a healthy nervous system.*