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.
Use a food thermometer to check. Serve or keep food hot in chafing dishes, slow cookers, and warming trays. Be aware that some warmers only hold food at 110 Â°F to 120 Â°F, so check the product label to make sure your warmer has the capability to hold foods at 140 Â°F or warmer.