this is interesting:
A study on 6-OXO was recently completed by a prestigious clinical research organization*. This study examined the blood hormone responses over a 3 week cycle of 600mg a day of 6-OXO. The study used 6 normal men aged 32-40, and in addition to tracking changes in sex hormone levels it also looked at common indicators of toxicity.
The results were very impressive. Total testosterone levels rose an average of 188%, while free testosterone levels rose an average of 226% over the course of the three weeks. The variability among the 6 subjects was quite low, and most of the testosterone increase was seen after only the first week. Results from two of the six subjects are demonstrated below.