Prolab® Beta Alanine Exreme® - 56 Capsules Prolab® Beta Alanine Extreme® Is A Dynamic Blend Of Carnosyn® Beta Alanine And He Amino Acid L-Histidine, Designed To Delay Muscle Fatigue. Beta Alanine Floods The Muscles With The Specialized Amino Cid Carnosine To Work As A Buffer Against Lactic Acid Buildup Helping You Train At A Higher Intensity For A Longer Period Of Time Before Fatigue Sets In. You Do Your Part. We'll Do Ours. ® Endurance Recovery Stamina | Prolab Beta Alanine Exreme - 56 Capsules (28 Servings)