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.
It means, âbefore putting in the food, turn on the oven and heat it until the temperature inside it is 350Â°â. Usually, this is done by turning a temperature dial on the oven to the â350Â°â setting and waiting for an indicator light to go outâthat will tell you that the target temperature has been reached. How long this takes depends on the volume of the oven and the power of the heating element.