Funny as it may seem, I have only heard about MHN in theory, and have never seen anyone actually use it. Therefore, I can tell only from what I know theoretically about it - it is an extremely potent steroid, with the major side effect being very pronounced liver toxicity. It does not aromatize into estrogen, so this should not be a concern. However, androgenic side effects may occur, so you must be aware of that. Usually, 10 mgs per day should suffice to give most bodybuilders quite visible results. Make sure to be using a very good liver supporting supplement with it, such as N2Guard, as it has so many ingredients aimed at liver support, including TUDCA.