Contains an ingredient called beta-alanine. Beta-alanine supplementation has been shown to increase muscle carnosine levels, which can act as a buffer to reduce the acidity in the active muscles during exercise. Carnosine reduces lactic acid accumulation in your muscles during exercise, which leads to improved athletic performance. Taking beta-alanine may cause a sensation typically described as “tingling of the skin or pins and needles” and there is no need to be alarmed. This sensation varies with individuals, some might experience it and others might not. If this sensation occurs, it does not last long and it is usually experienced in the face, neck and back of the hands.