theres a difference with use and abuse, of anything for that matter. there will always be 2 sides of this issue, but the same with every issue.

if your predisposed to cancer or disease im sure steroids would speed up the rate of the cancer. thats pure logic, but doesnt mean it caused it.

diuretic drugs, DNP, GHB...stuff like this i think prolonged use or abuse will cause a number of things BAD. but thats just me