Extended Endurance and Performance, Time-Released Branch-Chain Amino Acid Complex, 50 True Servings, Pre, Intra, Post, 150 Plant Capsules, Substantiated Effects. Increased branched-chain amino acid (BCAA) intake has long been shown to be the lynchpin behind maximizing muscle protein synthesis. Consuming BCAAs pre, intra and post workout provides substrate for energy, prevents the breakdown of muscle tissue and ensures a full and quick recovery. Our unique, time-released formula satisfies all 3 phases of exercise induced BCAA demand with only a single dosage; the gray beads release rapidly while the black beads release 60 minutes later, quenching your depleted muscles with another shot of BCAAs. Purus Labs is proud to introduce BCAAXR, the world's first time-released branched-chain amino acid complex!