I was going to point out the "steriod newbie thread" search also, but warhorse got it.
Also search for "Syringe/needle" for another article.
One thing I have found helpful is to do a search in the T-forums for
(...my apologies to all I have left out but the list would go forever)
read everything the aforementioned people have put their name on in doing so, you will learn other names to search and follow. You will also learn different topics to further search on...the steroid newbie thread will help explain some of the 'lingo'.
You can also do a search simply for 'steriods' with the "T-mag" selected and find many articles like
Steroids for Life
My last advice is to take what the 'vets' say to heart, but don't flat out believe it just because someone has said it. Further research until you can find definative proof, etc. Never be satisfied. Come back and discuss your opinions.
Hope atleast some of that helps.