Scivation produce one of the most advanced best selling endurance enhancing supplements in the UK - Scivation Xtend is composed of a BCAA blend (Branch Chain Amino Acids), Citrulline Malate and other ingrediants designed to enahance stamina during your workout and avoid muscle catabolism. It's perfect to take before morning cardio, especially on a cut, and would ideally suit someone who enjoys long workouts or is trying to reduce bodyfat without losing any muscle. For more information on BCAAs, check out our BCAA section. We now offer an identical version of Scivation Xtend in our own range for slightly better value - Bodybuilding Warehouse Excel. Bodybuilding Warehouse Excel is a high-quality blend of BCAA's, Citrulline Malate and Vitamin B6 designed to enhance recovery, reduce catabolism and enhance endurance making you able to workout harder, for longer.