Biotin (Vitamin B7) is a water-soluble vitamin. People who are deficient in biotin may show symptoms such as thinning hair, brittle nails, and skin rash. Biotin helps the body convert food into energy and also helps manage blood sugar levels. This 10,000ug liquid biotin is highly absorbable and is suitable for women and men who are looking for a vegan-friendly and gluten-free supplement.