Is there any drawback in using supplements from an early stage...

[shrek]

I've been for nine months at the gym and am 18, and I wanna speed up the process of gaining...should I look up for some supplement or just keep concentrating on the usual diet??

 

[Amino89]

Concentrate on your diet and training. I'd stick to the basics with things like:
Multivitamin
Fish Oil
Protein
Micronized Creatine Monohydrate

 

[Built]

^ agree 100%.

I'm a big fan of not fixing non-broken things. You're making gains - enjoy them and eat up!

 

[nni]

I've been for nine months at the gym and am 18, and I wanna speed up the process of gaining...should I look up for some supplement or just keep concentrating on the usual diet??

thats not what supplements do. supplements, supplement a solid diet and training routine. focus on them, then start looking into supplements.