DL-3-Hydroxybutyric Acid is widely used in the field of biochemistry and medical research as a key component in studying metabolic processes, particularly ketosis and energy metabolism. It serves as a precursor in the synthesis of biodegradable polymers, which are essential in developing environmentally friendly plastics and medical devices. In the pharmaceutical industry, it is utilized in the formulation of drugs aimed at treating metabolic disorders and improving energy efficiency in cells. Additionally, it plays a role in nutritional supplements designed to support ketogenic diets and enhance athletic performance by providing an alternative energy source. Its application extends to cosmetic products, where it is incorporated for its moisturizing and skin-conditioning properties.