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.
â¢ Keep Rising Dough Warm: Yeast works best at temperatures between 70Â°F and 80Â°F. If your house is cool in the winter, place the bowl somewhere warmer, like the top of a fridge or in a warm (but turned off!) oven.If you put the dough on a heater to rise, insulate the bottom of the bowl with a few fluffy towels. Keep Rising Dough Warm: Yeast works best at temperatures between 70Â°F and 80Â°F. If your house is cool in the winter, place the bowl somewhere warmer, like the top of a fridge or in a warm (but turned off!) oven.