Q: I'm 16 and I've been reading up on taking supplements. My dad says he thinks I should wait, because it might affect my growth or do something to my normal hormones and development. I'm not talking about taking steroids, just supplements to help me in the gym and with football. My parents want me to ask an expert on the subject since our family doctor didn't know the answer. What's okay for a guy my age to take. I've been training for the past 6 months in preparation for my football season. Here's what I want to take:

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