Multivitamins are good insurance during those days when you know you won’t get the daily maximum amount of nutrients. Look for one with a concentration of chromium and vitamins B6 and B12. Chromium improves your body’s aptitude to convert amino acids into muscle.
A study found that men who exercised on a regular basis and took 200 micrograms of chromium a day and added more muscle and lost considerably more body fat than lifters not taking the supplement. Also, since hard workouts diminish your B vitamins, it’s good to find vitamins with high doses, especially those that have megadoses of vitamins B6 and B12. Besides, it will assure your entire daily allowance of endurance-boosting zinc.