### Can Biotin Improve Skin Health and Help with Acne? Biotin, also known as vitamin B7, is one of the eight water-soluble B vitamins. It helps enzymes break down fats, carbohydrates, and proteins in food and plays a role in regulating cellular signals and gene activity. While there is no recommended daily allowance (RDA) for biotin, the adequate intake (AI) for adults over 19 is 30 mcg daily, and for breastfeeding women, it is 35 mcg daily. Biotin deficiency is extremely rare, but when it occurs, symptoms can include skin issues, hair loss, and brittle nails. Because of these symptoms, biotin supplements are often marketed as beneficial for skin, hair, and nails. Some studies suggest that biotin may help improve comedonal acne (blackheads and whiteheads) and control flaking and irritation caused by retinoids used for acne treatment. However, the evidence is not conclusive. For example, one study showed improvement in acne for participants who used a topical cream and took a supplement containing biotin, but the supplement also included other vitamins and ingredients, making it unclear if biotin was the key factor. Most people get enough biotin from a varied diet, with good food sources including eggs, nuts, and whole grains. While biotin supplements are generally safe even at high doses, they can interfere with lab tests and interact with certain medications, such as those used to treat epilepsy. Additionally, raw egg whites contain a protein that binds to biotin and reduces its absorption. In summary, while biotin may offer some benefits for skin health and acne, the evidence is not strong enough to recommend it specifically for these purposes. It's always best to consult with a healthcare provider before starting any new supplement.