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.
Set the oven temperature high enough to keep the food between 140Â°F and 165Â°F (use a meat thermometer to check). Make sure all of the food stays hot, including side dishes. Cover with foil to keep foods from drying out. To keep your food tasting good, don't hold hot foods for longer than two hours before serving.