I learned the hard way, I will not take MK-677 ever again while dieting or cutting. I'm currently 6 weeks in my physique contest prep and have taken MK-677 since the first week. This stuff really takes a toll on my blood sugar, especially since I've started fasted cardio for 30 minutes in the mornings 4x a week. I've become extremely irritable between meals and it doesn't help that my adrenals aren't the strongest to deal with the stress of low blood sugar. Since adding in the DermaTren recently my irritability and lashing out at people has gotten a lot worse. Before when I took DermaTren I was a bit irritable but nothing like now when combined with MK677. I made the mistake last night and took 30mg of GHAR1NE thinking I would get better sleep. Sleep was very deep but I almost passed out this morning during my cardio as I just felt my blood sugar was too damn low. IGF really hits blood sugar hard and I'm really re-thinking ever taking HGH as I get older, honestly I've had better sleep with Somatomax. I've been somewhat disappointed as my joint pain really hasn't gotten better on lifts. I might try and use this when I bulk up and not have to watch calories so much. I'm taking plenty of cycle and liver support with the pro hormones I'm using.