BTN tablet contains biotin 5mg. Biotin is one of the most vital nutrients in the B-vitamin complex, helping you promote growth and overall health. This helps your body convert protein, fat and carbohydrates into glucose energy to promote a better functioning metabolism. Biotin also helps you maintain the look and health of your hair and nails, preventing them from becoming brittle and dull. Biotin can help you metabolize carbohydrates more effectively, helping you to manage your blood sugar level Biotin helps promote hair growth, strengthen nails and can support healthy blood sugar levels. Although taking too much biotin may have potential side effects. Acne: Getting too much biotin increases risk of developing cystic acne on the chin and jawline, but it is found that the acne fades a few weeks after you stop using biotin supplements. Make sure plenty of water while using biotin supplements to reduce your risk of developing cystic acne Allergies: Allergic reactions to biotin are not common, but they are still possible Miscarriage: If you are taking high doses of biotin while you are trying to get pregnant it can increase your risk of suffering a miscarriage. Use under medical supervision