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.
The core temperature when the food is cooked should be at least 75 degrees celsius. The food should not cool to below 63 degrees celsius before it is served.ccording to the USFDA 2009 Food Code, hot food should be held at 135Â°F (57Â°C) or above.