Performance enhancing drugs receive a very bad press,and in the majority of cases,rightly so,however........
Used responsibly,and with much research and understanding,which includes everything from diet and training to lifestyle and personality,they are an aid to an end result and certainly,imo,alot less of a risk to ones health than(tax earning) drugs such as alcohol and tobacco.
Now I am certainly not supporting their use,as I have trained 'naturally' all my life,however,to provide some balance......they are,without doubt,demonised by rumour,myth and misinformation,the negative stories that are often attributed to their use are mostly speculative and assumptious at best,with hard facts with regard to their side effects being sketchy to say the least.
In regards to the OP,at 12 stone,i'm sure he could have achieved his goals without their use,as,i would guess..... there is much room for unassisted growth.
In his 'defence' though,he does come across as being responsible and sensible and has answered himself well in regards to his personal choices.
I think he should be cut a little slack