Beta-aminoisobutyric acid (BAIBA) is a naturally occurring amino acid that is produced in the body during the metabolism of certain nutrients. It is classified as a non-proteinogenic amino acid, meaning it is not used to build proteins. BAIBA is primarily found in muscle tissue and is thought to play a role in energy metabolism and muscle function. Research suggests that BAIBA may have potential health benefits, including promoting fat loss and improving insulin sensitivity. It is also being studied for its possible effects on exercise performance and overall metabolic health. However, more research is needed to fully understand its functions and benefits.