Ester Sized XP Benefits: Induce Pumps Strength Gains Muscle Fullness Promote Fast and Efficient Recovery Promote ATP Productino Via Multiple Pathways Induce Complete Creatine Absorption and UtilizationEST Ester Sized XP utilizes CEM-AKG, Di-glutamine ester and a unique BCAA & ATP matrix, to provide the most advanced creatine and recovery formula available. Ester Sized XP was designed to give the athlete that edge than let them train harder to get more results.