Do you also think your hair is thinning, nails are getting brittle, and you feel fatigued and tired too? Well, a significant reason for this could be the lack of vitamin B7. This vitamin, also known as Biotin, is essential for the body’s metabolism and functioning. It is a necessary component made of a number of enzymes that are responsible for several critical metabolic pathways in the human body. Even though the deficiency of this vitamin is rare, it can affect you in many ways. Recently, celebrity nutritionist Nmami Agarwal shed light on how this vitamin deficiency can affect your body.