Biotin (Vitamin B7) is a water soluble, essential B vitamin which is naturally found in bread, liver, pork, salmon, avocado, cheddar cheese, and egg yolks. It may also be found in certain bacterial colonies in the large and small intestines. Biotin is widely known for its importance in cellular development and its assistance in fatty acid, carbohydrate, glucose and amino acid metabolism. Biotin is also a very important nutrient in hair, skin and nail health. Healthy Origins Biotin is suitable for Vegetarians and Vegans.