Our 100% Beta-Alanine Amino Acid is a pure form of the amino acid, beta alanine, that is perfect for adding to your daily protein shake. What is beta alanine? Beta alanine is a non-essential amino acid and is the only naturally-occurring beta amino acid. Beta alanine is different from most amino acids, as it is not used to synthesise proteins. Instead, it produces carnosine, which is stored in your skeletal muscles and reduces the build-up of lactic acid in your muscles during training.