I've never heard that before. I've heard that in the general population there is a statistical link between olive oil use and lower bad cholesterol, but I've not heard that the oil itself lowers the bad and raises the good. If I took olive oil supplementation, or used it regularly in cooking, my bad cholesterol would definitely go up. I don't use oil at all, except when cheating (I'll use a little if cooking for friends). The way I have heard it explained, that makes sense to me, is that olive oil has a smaller percentage of saturated fat than most other oils (14%) and therefore it would raise the bad cholesterol less than other oils would raise it. But it still raises it. That's why, on my restricted diet, I don't use oil.