GymBeam BCAA 4: 1: 1 Instant představují instantní aminokyseliny Leucine, L-Isoleucin a L-Valin s rozvětveným řetězcem. They are made by fermentation, in an ideal ratio of 4: 1: 1, and come from natural ingredients, making them suitable for vegans and vegetarians. You can use GymBeam amino acids before, during and after training.