Many people who have used biotin supplements have mostly positive reviews for the wondrous biotin nature that improved deficiency. Biotin can do a lot for thinning hair, hair loss, skin, and even nails, perhaps increasing their appearance quality. Here's what you need to know about the vitamin, as well as the best supplements for you. What is Biotin, and Why Do You Need a Biotin Supplement? ADVERTISEMENT Biotin is in the family of B vitamins known as vitamin B7. It is involved in several metabolic activities that occur in several animals and also humans, primarily those metabolic activities that involve the use of lipids, carbohydrates, and amino acids. The National Institutes of Health (NIH) stated that the B vitamin is necessary for your body. You may likely be very familiar with biotin as a supplement. It can also be present in some foods. Meat, particularly beef liver, is a very good source of biotin, pork chops, hamburgers, fish, eggs, dairy products, and several...