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.
Instructions. Take the dish out of the oven and lower the oven temperature to Warm or its lowest temperature, commonly between 225 and 250 degrees Fahrenheit. Cover the dish tightly with aluminum foil. Insert an oven-safe thermometer through the foil and into the food.