man i had the same problem....but your 19 and at that age you basically have natural steroids in your body its growing that fast. So use that up so it doesnt go to waste then when you hit 21+ or whatever go ahead take juice.
If you juice now, your going to take a stupid cycle like ur "Dbol only" cycle. cuz ur scared of the side effects and stun your grown..etc. Once your older you can take a good strong cycle and not go to waste.
If you want good results take some creatine. NO explode will get you bigger, i've tried it and recommend it to all my friends who take suppliments.
If you take working out seriously you'll see gains, eat hard and work hard, its worth it in the end bro.
Good luck