Best BCAA Powder Blue Raspberry is the most advanced BCAA drink mix and is packed with 7 grams of BCAAs, 2. 5 grams of L-Glutamine, and 1 gram of Citrulline Malate. Plus, with a unique blend of hydration-inducing electrolytes, Scivation Xtend is a calorie-free way to help anyone grind through even the most gruelling gym sessions.