100% Pure BCAA (2:1:1). 1000mg Branched Chain Amino Acids. We use the purest and most bio-available form of BCAAs in the world. BCAA 1000 Caps is a 2:1:1 ratio of Leucine: Isoleucine: Valine. BCAAs are in capsule form, giving you nothing but the purest form of BCAAs which absorb easily and rapidly. Why use BCAAs? BCAAs refer to a group of essential amino acids including leucine, isoleucine, and valine. Though amino acids are the building blocks of protein, your body can't produce them, so they must be consumed as part of your daily diet. BCAAs are most beneficial when included with post-exercise recovery nutrition, which should begin within 30 minutes of finishing your workout.