BRM is right... at my heigh 15lbs is a lot different than a person 7'' taller... that is why i recommended to his via PM to use
500mg test/wk
400mg deca/wk
30-50mg dbol 1-4wks

however, i informed him that the proper diet is needed.
and as BRM said core exercises are key to building mass, but dont forget to add some drop sets and supersets throughout this cycle to really shock those muslces... works great for me...
remember the anties and clomid
if using dbol drink lots of water and take 1000mg of milk thistle a day
i love using glut at night 10-15g , but that is my perference.... good luck...
guys remember this guy is only 18
MM