i BCAA 8:1:1 is our most advanced branched chain amino acid to date. i BCAA 8:1:1 contains the three branch chain amino acids Leucine, Isoleucine & Valine in a ground-breaking 8:1:1 ratio. This blend has been expertly developed by our in-house nutritionists to deliver a far superior amount of Leucine. Unlike most BCAA supplements, our i BCAA 8:1:1 provides a whopping 4g of leucine per serving.