Oil kills kidneys as they try to filter it out of the body. Oil on a salad is one thing. Injecting it into a muscle where it is eventually traveling through the blood stream is another. Steroids can damage the kidneys. It can lead to high blood pressure. There is no serious accepted study on users of these illegal drugs. How can there be? Do they have 200 volunteers who give their exact steroid use dosages? Do they submit to testing? Just seeing how many pros are in bad health should be enough empirical knowledge to come to a conclusion.
There are many double blinded studies regarding supraphysiological use of anabolics with volunteers (one of the most imporant one is Bhasins 1996 study "The Effects of Supraphysiologic Doses of Testosterone on Muscle Size and Strength in Normal Men") the problem with all of them is the cycle length is only limited to 8-24 weeks. There are large survey studies like Schwingels 2015 (
Recreational anabolic-androgenic steroid use associated with liver injuries among brazilian young men) but the problem is that people can lie what they use and anabolic users are 10 times more likely the use benzos/opioids and other drugs which makes it harder to make spesific conclusions regarding risks of anabolic steroids.
As you know pros use lots of different shit and they are just tip of the iceberg. Acute kidney failures among recreational AAS users are rare. That doesn't make anabolics safe thou.
