I just became a new member on this forum and it’s got so has such great content , for someone who had no direction was constantly being ripped off by these so called quality labs. I was getting my gear from a site called proroid . Not sure if anyone has ever ordered from these guys . Any thoughts? Anyways thanks to some advise I decided to order through SYN pharmaceuticals. I just have question can you stack mk677, test,primo, and mast . Is it ok t use all 4 or should I substitute one with another.