This has been my experience being around bodybuilding forever. A guy starts bodybuilding in high school and college. The bottom psychological make up is usually an insecure guy. Some where along the line they discover the gym guy who sells syringes, pills and vials out of the trunk of their car. They do a cycle and are amazed at the progress in 6 weeks.
Everyone is giving them props where ever they go. People start asking training advice but when advice is given they never mention the drugs because that would take away the praise they received. On cycle they feel aggressive, confident and a euphoria that just magically chases away depression. A segment of the female population that is ignorant to how he got his physique is practically dropping their skirt to be around him. The steroids are not cheap so a big part of their money goes to the drugs when they are in their early twenties. Then after 2 months of living a dream they go off to give their body a break. They start losing rapidly after a couple of months off. Psychologically they start feeling a little timid, nervous and feel depressed. They start craving that body and that mind set. Another cycle begins and the life style begins.
So many have thrown away education and the pursuit of a decent career chasing the steroid life style. It's addictive. The praise and fun of carrying around the physique every where they go is something they crave. Then starts the decades of cycling on and off. They stop when finances, health or even criminal arrest hits them. One of the three always comes up. Usually it's health. No there are zero reputable long term studies on the health of recreational bodybuilding drug use. Who would spent resources on studying a subculture of a sport? What I have is all empirical knowledge through the years.
All of my buddies who have competed and juiced for decades are in their 50's now. All with the exception of one look like they never did a push up in their life. Many have severe orthopedic injuries. Destroyed hips, shoulders, elbows and other sites that operations have failed to bring back to complete function. Two have died from heart attacks.
If I could give any advice to a twenty year old is that they should bodybuild and cardio if that's what they are into. Train natural. No, you can never enter a contest but you will look better than 99% of the male population increasing your health along the way. Be in awe of how pro bodybuilders look but never for one moment forget what you are looking at. Know they would look very different if the drugs weren't around. Use athletes as a role model for physiques instead of drug bodybuilders. Imagine if an elite MMA, sprinter, running back, Olympic lifter was on the Olympia stage? They would visually look like they barely lifted compared to the fluid retention, inflated, cosmetic, drug bodybuilders. The fact would be that they have muscles that actually can be used for an athletic endeavor. Strive for the same. End of rant.