ok so update after on week 8 days on osta-gains mk-2866.still no side effects at all.i am leaning out niceley weights all feeling lighter and been having good workouts. sex drive is thru the roof.i still think this stuff would be ideal for during a off period but i dont come off so.but i will say i allso think it can add to your cycle and you look and feel better while on cycle than without this.still early but i am likeing it so far and i hope osta -gain holds up to it side of the bargain and i am able to run this for 3 months would like to see what it can do in that time frame.