Biotin, also known as B7, is a water-soluble vitamin your body needs to help convert certain nutrients into energy. It is involved in a wide range of metabolic processes, both in humans and in other organisms, primarily related to the utilization of fats, carbohydrates, and amino acids. It also plays an important role in the health of your hair, skin, and nails.
Rare but possible Side Effects: Biotin is a water-soluble vitamin, so any extra biotin in your body will most likely flush out through your urine, making a potential overdose unlikely. However, some potential side effects can include, but are not limited to: skin rashes, digestive upset, problems with insulin release, kidney problems.