Taking the right balance of amino acids before you train leads to better workouts and jump-starts the results that intense weight training and a high-protein diet deliver. Here are four amino acid supps we recommend to improve your workouts—and your results.

WHAT YOU NEED

CITRULLINE MALATE

Boosts blood fow by converting to arginine, thus increasing nitric oxide production.

BETA-ALANINE

Supports strength by elevating carnosine, a peptide molecule that works with creatine.

BCAAs

Increase protein synthesis and prevent breakdown of muscle. BCAAs bypass your liver and get to muscle tissue quicker than other aminos.

TYROSINE

Boosts energy, mood, and sex drive, increasing production of dopamine, norepinephrine, and epinephrine.