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.
Frozen dishes like ice cream should be served at 35 to 40 degrees.old food should never be allowed to get warmer than 42 F 42-140 F is considered the danger zone for all hot and cold food. Cold food served below 42f and hot food above 140F â¦ .