NOW Foods Extra Strength Biotin 10000 mcg. - 120 Vegetarian Capsules NOW Foods Extra Strength Biotin contains 10000 mcg. of high quality Biotin. Biotin is a water-soluble vitamin necessary for normal growth and body function. Biotin is a key regulatory element in gluconeogenesis, fatty acid synthesis, and in the metabolism of some amino acids. ALongside its role in energy production, Biotin enhances the synthesis of certain proteins. In addition, Biotin promotes normal immunity and plays a critical role in skin health. Supports Amino Acid Metabolism Promotes Normal Immunity Vegetarian/Vegan Not manufactures with: wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. NOW Quality PhilosophyLooking back at the history of their company, they have made many commitments, including the commitment made by Elwood Richard in his health food store back in 1968 to offer their customers exceptional value. During this time, they have experienced tremendous growth and expansion. They have progressed from a family-run health food store to a leader in the nutritional supplement industry. They have fought for the rights of consumers to use dietary supplements. And through it all, they have never lost sight of their mission to provide value in products and services that empower people to lead healthier lives. But these are different times that we live in, and their industry is constantly being challenged. False media reports have consistently downplayed the value of dietary supplements, challenging their efficacy and safety. NOW has, and will continue to be, committed to manufacturing quality products. This includes the utilization of current, cutting-edge science in the formulation of their products, strict scrutiny when choosing raw materials, advanced testing and validated methods development, and the employment of skilled, highly trained individuals who are passionate about fulfilling their mission.