What are myvitamins bcaa tabletsbranched chain amino acids bcaas contain a 211 ratio of leucine isoleucine and valine they are considered to be essential amino acids as they cannot be synthesised in the bodywhy use myvitamins bcaa tabletsbcaas can be consumed throughout the day before during and after workouts you can increase the effectiveness of bcaas by consuming 10mg of vitamin b6 with every 10g of bcaawho can benefitthese are suitable for anyone taking part in intense training