The stack that will make you swoll. It’s a unique combination that you won’t be able to get enough of. The MK-677 boosts growth hormone and helps with fat loss, it’s paired with the awesome YK-11 which covers your needs in the mass gains department. The third compound in this love triangle, S23, is strongly synergistic with the first two. It will more than promote fat loss while boosting strength and aiding in muscular development, size and strength.