Sinew's hair, nail and skin is loaded with vitamin b which helps in keeping healthy hair, nail and skin. Biotin is a coenzyme and is also known as vitamin b7. Biotin plays a key role in the body. It supports the health of the skin, nerves, digestive tract, metabolism and cells. No artificial flavours, colors derived from natural sources. No synthetic dyes, no preservatives, no yeast. How to use adult dosage one softgel a day with ample water. For best results please take a minimum of 3 months dosage.