I'm 15 and lift 4 days a week for football, and sometimes on the weekends. Lots of guys are starting to take workout supplements so I feel like I'm falling behind. What is a good workout supplement to build muscle fast and burn fat? One with as little fillers as possible. Also, I want to make sure it's healthy and won't have any harmful side effects.
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What is the best workout supplement to build muscle quickly and burn fat?