Biotin, also called vitamin H or vitamin B7, is a water-soluble B vitamin.  It is involved in a wide range of metabolic processes, both in humans and in other organisms, primarily related to the utilisation of fats, carbohydrates, and amino acids. Biotin is also a crucial nutrient during pregnancy, as it’s important for embryonic growth.   The word “biotin” comes from the ancient Greek word “biotos,” which means “life” or “sustenance.” Part of the B vitamin family, it is an essential vitamin that helps maintain healthy hair, skin, nails and mucus membranes.