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.
Just make sure to keep hot foods hot and cold foods cold. Keep hot foods at 140Â°F or warmer by using chafing dishes, slow cookers, and warming trays. Keep cold foods at 40Â°F or colder by nesting dishes in bowls of ice. You may also use small serving trays and replace them often.