I do not think I will be worrying about staying warm this Winter. My body since I started taking this stuff is like a furnace, in a healthy way.
I take L-carnitine with Coezyme Q10 and Magnesium. Being recently ill and reading that people my age start suffering from energy problems my research showed that are "energy powerhouses" mitochondria need nutrients which may be lacking at my age. Q10 and magnesium help the mitochondria work efficiently and L-carnitine assists in the transport of fats into the mitochondria to be used as "fuel" creating energy and of course heat. I hope that is a simple explanation for what is a long system of pathways used by cells and mitochondria.
I started at 2 a day for 21 days and then have gone down to 1. I do seem to be developing leaner muscle but I cannot say i have lost much weight. My father on the other hand I suggested this to and he has lost weight and a friend to. So if your interest in weight loss only, I would not bother, but for an overall body action plan definitely.