What is Leucine? BULK POWDERS™ Leucine Tablets contain a full 1000mg of leucine per tablet – i.e. the 1000mg refers to the active ingredient, not the tablet size. This means you do not need to take 8-10 tablets to get an appropriate amount of leucine; 2-4 tablets provides you with 2-4g of leucine. We are one of the only companies packing this amount of leucine per tablet, so please check competitor products carefully, which will generally only contain 500mg leucine per capsule or