Biotin (or vitamin B7) is one of the B vitamins and it’s produced by the body. It is believed that biotin helps keep hair thick and healthy because one of the signs of deficiency is hair loss1.  It’s necessary for the proper metabolism of protein, fat and carbohydrates – over time, poor metabolism of nutrients can contribute to undernourished hair follicle cells.
Most foods contain some biotin so the good news is you can all the biotin you need from a balanced and varied diet2. Foods rich in biotin include eggs, sweet potatoes, onions, pecans, almonds, tomatoes, carrots, avocados, walnuts and salmon.