Synthroid

My Doc has told me that i have a slight sluggish thyroid and wants me to take a low dose of synthroid. I was always under the impression that a sluggish thyroid would lead to weight gain. I don’t have this problem. I have a very fast metabolism and have a hard time putting on weight (i eat 3800cal/day to maintain). Will going on synthroid make me lose weight?? And is it ok to do a AAS cycle while taking it?

you might want to get a second opinion or do your own research before you start taking that stuff.