BCAAs vs. Pre-Workout: Which is Better to Take? Dietary supplements have gained significant attention for their important role in enhancing exercise performance and achieving fitness goals. Among the most common supplements, Branched-Chain Amino Acid (BCAA) supplements and pre-workout formulas stand out. BCAAs, comprising essential amino acids, are vital for muscle growth and recovery. David Robinson, PhD UK Fitness ProJan 8 · 6 min read