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.
Hot food should be held at 140 Â°F or warmer. Cold food should be held at 40 Â°F or colder. When serving food at a buffet, keep hot food hot with chafing dishes, slow cookers, and warming trays. Keep cold food cold by nesting dishes in bowls of ice or use small serving trays and replace them often.