I started to get into cycling, but when I learned that quite a few guys I raced against (only race I ever did) were using "undisclosed supplements," I said to hell with it.
I will say that all the people I raced when I skated were 100% clean. If they weren't, their steroids were absolute crap since I was right there with them. I once placed 13th overall out of 345 people in a full marathon at an 18.98 MPH pace... which is hauling ass for an amateur. I was only 24 seconds behind first place, so you can imagine how close of a race it really was.