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.
Report Abuse. Preheat your oven to 350 degrees. Place your food in an oven-proof dish and cover with foil. Let warm for about 15 minutes.Check, warm a bit longer if need be. just now. Report Abuse. The lowest temperature your oven could go to is 170 degrees. Plan ahead because it takes at least one hour to heat up your food to temperatures as if you have just cooked them.