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.
Hot foods should be kept at an internal temperature of 140Â° F or warmer. 1  Use a food thermometer to check. 2  Be aware that some warmers only hold food at 110Â° F to 120Â° F, so check the product label to make sure your warmer has the capability to hold foods at 140Â° F or warmer.ook. 1  Heating foods to the right temperature for the proper amount of time kills harmful bacteria, so cook meat, poultry, fish, and eggs thoroughly. 2  If making sauces or gravy using meat juices, be sure to bring it to a boil. 3  before serving.