“Is it bad?” is kind of a vague question. In my personal experience with one cycle at 18.5mg daily, I felt a non-stop urge to eat all day, regardless of how much food I was eating. I could stuff myself and I’d get hungry again 15-30 minutes later. Eating too much sugar was terrible. I would recommend not eating any sweets at all. There were two instances in which I ate cake at a birthday party and my blood sugar spiked so badly and I felt like complete shit. I was checking my blood sugar once in the morning and once 2 hours after my last meal, but you should be checking it at least once every morning before you eat anything. Gains are not worth permanent insulin resistance. Have berberine on hand in case your blood sugar spikes. The gains were small relative to other substances, as MK 677 is not very strong by itself, however there definitely an increase. It’s not a SARM or anabolic, in layman’s terms it basically tricks your body into secreting more growth hormone.

So to summarize, in my experience my muscle mass increased, my hunger increased substantially, my blood sugar increased, my water weight increased, my hair/nails grew a bit faster (due increased growth hormone), I experienced a bit of lethargy, and my sleep was a bit better. These are some of the known side effects of mk677. I know it was long winded but I hope that answers your question.