Turinabol is a derivative of methandrostenolone, also adding a chlorine atom in the fourth position. This causes that Turinabol does not aromatize, and also its metabolites leave the body very quickly, being useful especially for athletes who have to pass anti-doping tests. Its action time is 15 to 16 hours.
It is a highly anabolic product and very low in androgens, but it is quite a powerful substance. Turinabol does not aromatize therefore gynecomastia is not possible, nor does it produce water and fat retention, but it has a great drawback, which is its high liver toxicity as it is 17-alpha alkylated.
The use of Turinabol leads to moderate gains in muscle mass, but of good quality, without fat and water retention. Also the side effects are not pronounced except for liver toxicity. It is a substance that does not suppress the hormonal axis much in moderate doses and short cycles, 20 mg. day they would lower your endogenous testosterone production to 60-70%, which is not much compared to other substances, but if you have to bear in mind that taking testosterone together with this substance is a good choice.