A few studies have been conducted showing that anabolic steroids may comprimise brain function by altering dopamine and seratonin levels in the brain. The amount of research is very limited, however one study comparing AAS using bodybuilders and AAS free bodybuilders showed AAS users had structural changes in certain parts of the brain and AAS users preformed significantly less well on a visuospatial cognitive task than nonusers. A few more studies in rats hint that nandrolone can cause brain damage, even at relatively low end doses. What do you guys think about this? Any truth to it or is it the usual anti-steroid propaganda. There was one study that came to the conclusion testosterone caused brain cell apoptosis (death), however I find that study invalid due to the ridiculous amount of testosterone that would need to be used in order to replicate such results.