L-Alanine (C3 H7 NO2) is a crystalline, free-form non-essential amino acid. The liver can convert L-alanine into glucose which can be used as an energy source for muscle; when glycogen stores are low, it can convert the glucose into glycogen. Glycogen is a storage form of glucose.

L-Alanine is highly concentrated in muscle tissue. During strenuous exercise L-Alanine is released into into blood and enters the liver where it is converted to pyruvate which in turn is converted to glucose for increased energy and endurance. L-Alanine is an excellent addition to your pre-workout energy drink and because it serves as muscular fuel for increasing power, strength and endurance for body builders and performance athletes.

L-Alanine can also function as an inhibitory or calming neurotransmitter in the brain. Alanine has been shown to stimulate the immune system. It may also help stabilize the blood glucose levels in people with hypoglycemia.