Beta Alanine is an amino acid which combines with the amino acid histidine after consumption. Histidine is always available in sufficient quantities in a high-protein diet. These two amino acids form carnosine, whose primary function is to buffer hydrogen ions.
Buffering hydrogen ions prevents a drop in the muscles' pH value, which leads to hyperacidity. Hyperacidity leads to muscle burn and muscle fatigue, which then leads to muscle failure at the end of a set.
Taking 4g beta-alanine every day for four weeks will increase your Carnosine level by approx. 64%. After ten weeks, your carnosine level will increase to over 80%. The increase carnosine level affects all muscle fibre types – type 1, type 2a and 2b (slow-twitch and fast-twitch muscle fibres).