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.
Keep It Warm. If you're going to be eating pizza within a short time, keep it warm in the oven rather than leaving it out on the counter. Bacteria multiply most rapidly at temperatures between 40 and 140 degrees Fahrenheit, according to the National Institute of Diabetes and Digestive and Kidney Diseases.