biotinandhairloss. org Cause of Hair Loss in Teens and AdultsThere are many causes of hair loss. Both men and women can obtain it. It can be because of nutritional deficiency, hormone imbalance, tension, and illnesses. But usually the most common reason for it’s called adrogenetic alopecia. It is the medical term for hair loss or baldness. Adrogenetic refers towards the influence of androgens (male hormones), and genetic predisposition to balding could be the reason of such a hair loss. Genetic is not that simple, and also the hair loss case.