Well, I'm pretty sure I know the product OP is talking about.  It does work. It makes ATP production super inefficient and you get excess heat production. Your cells need ATP to not die.  What tends to happen is your body gets really warm and your cells die. You need your cells not to die if you want to not die. The margin of safety for this product is very very low, no doctor in their right mind will advise it. It's a good way to kill yourself.