Beta-Hydroxybutyrate (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 and supporting brain function in these states. BHB is commonly found in supplements aimed at promoting ketosis, a metabolic state where the body burns fat for fuel instead of carbohydrates. These supplements are often used by individuals following a ketogenic diet to enhance energy, improve mental clarity, and support weight loss efforts.