1 Having high or low cholesterol does not exclude a person from donating blood. 2  Potential blood donors may be temporarily prevented from donating if they have a low level of iron (hematocrit) in their blood.
Headline Clickable. To keep food warm without overcooking, set your oven to the lowest temperature (which is probably 200 degrees F) and cover the food with foil.eadline Clickable. To keep food warm without overcooking, set your oven to the lowest temperature (which is probably 200 degrees F) and cover the food with foil.
Get Your Temperature Just Right. Once you add food to your hot oil, the temperature will dropâtherefore, you'll want to get it hot before cooking. Recipes may vary, but you'll want to preheat your oil to somewhere between 325 and 375 degrees. During cooking, you should aim to keep it between 250 and 325 degrees.