Steriods i will say if mixed with out knowing what your doing or with out research will injure or kill.
I'm sorry mate but this is just plain hogwash because just this is done thousands of times a day across the UK with guys having no real idea of the biochemistry involved, or dosages or mixtures, and if you were right, we would be seeing a virtual epdiemic of seroius illness or deaths.....and we ain't.
And guess what Shad, I too know people who have died prematurely, and none of them took roids ....get my point?