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 & perform for longer. It may also prevent lactic acid build up during intense exercise thus reducing fatigue. Supplementing with Beta Alanine can increase endurance & 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 & lean body mass. Warnings: Beta Alanine can cause a tingling & flushing effect on the skin. This is a perfectly normal reaction by the body & not harmful.