I'm 13 years old (14 in June) and I've been working out for some time.
I'm getting what I feel like are awesome results in definition and size of the muscles, but I feel the actual quantity of weight I can lift is growing at a pretty slow rate (I haven't figured out what the problem is).
The other guys at my gym are telling me I shouldn't worry, but I can smell they are telling me that only because they don't want me feeling bad about it; consider that they are older than me (a couple of guys aged 17 have been coming to the gym in the last weeks, but their knowledge is worse than mine), the youngest one is 18/19 (unless there is someone younger coming at different schedules, which is unlikely if you know my gym).
Last week I went to a nutritionist who made me a diet which I'm following right now, but I want to do more, I want to up my game, I'm a really competitive dude.
I asked my gym mates their opinion on the matter, they told me they think I'm too young for that.
But I don't see why, I'm pretty sure it doesn't mess up someone's growth (I'm talking about growing up, not gym-related growth).
Why do they think that? I have the motivation to do it, is there something important I'm unaware about?
I'm hoping that taking them would give me a boost.