Okay, so basically I signed up at my local gym today because I seriously need to build up and PUT ON WEIGHT!

I've always been skinny but didn't think it was a problem... I went to the gym today, had a good session then checked my weight... and I'm 54kg (8.5 stone) and I'm 5'10"/5'11".

It really hit home how bad I've gotten, I've recently stopped smoking cannabis after heavily smoking it for around 2 years now (I'm 16 years old) and have completely lost my appetite.

The short and narrow is that I NEED to put on weight so I even feel comfortable with my top off. Any of you fitness guru's have any advice on what supplements I should get? I.e weight gain powder/protein powder/both/combined?

It has been really difficult for me to post this here so I'd appreciate it if nobody took the piss...

Oh and also I'm a pretty heavy smoker, but I am working on this as we speak.