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.
1 Raise the baking temperature slightly; the faster cooking time will keep the recipe from rising too much. 2  At elevations over 3,500 feet, the oven temperature for batters and doughs should be about 25 degrees F higher than the temperature used at sea level.