Beta Alanine is a non-essential amino acid that combines with L-Histidine to help form Carnosine. Increasing the concentration of Carnosine in muscles is vital to athletes as Carnosine can increase your ability to work harder and perform for longer. It may also prevent lactic acid build up during intense exercise, thus reducing fatigue. Supplementing with Beta Alanine can increase endurance and endurance based performance by reducing the effects of the fatigue inducing by products of intense exercise. This in turn can lead to greater gains in strength and lean body mass. Warnings: Beta Alanine can cause a tingling and flushing effect on the skin. This is a perfectly normal reaction by the body and not harmful.