A while back, the doc put me on some thyroid medication Levothyroxine for underactive thyroid. I didn't even know I had one, active or otherwise, but I can tell you that whatever this med is it's good stuff. I've got more energy, eat about the same and have lost ten pounds without dieting. My cholesterol numbers are lots better and I don't even take anything for that. I'm glad he came up with this stuff, he said I responded exceptionally well to treatment, and he won't need to see me for another six months, if I don't get ambushed by something unforeseen in the meantime.