Beta-Hydroxybutyric Acid (BHB) is a type of ketone body produced during the breakdown of fats in the body. It serves as an alternative energy source when glucose levels are low, such as during fasting or a low-carbohydrate diet. BHB is important for maintaining energy levels in the brain and muscles. BHB is often studied for its potential benefits in various health conditions, including epilepsy, Alzheimer's disease, and metabolic disorders. It can be found in supplements and is also naturally produced during the ketogenic diet, which emphasizes high fat and low carbohydrate intake to promote ketosis.