Optimal doses of barley as a food or supplement have not been established for any condition. However, to try to lower cholesterol, people have used one of these daily doses: 1  3 grams of barley oil extract. 2  30 grams of barley bran flour.
Still, the very best way to raise your body temperature is to go for a light jog - just get your heart pumping. Jogging/running is one of the easiest ways to get your heart pumping in a short amount of time and works throughout your whole body (as opposed to the heat pad).
Hyperthermia is a condition in which the body's temperature is higher than normal. (Remember, normal body temperature is 98.6 degrees Fahrenheit.) You might think hyperthermia is synonymous with fever, but not quite. When you're sick, the body purposefully raises its temperature to try to fight the infection, and the temperature on the thermometer goes up. Hyperthermia is a little bit different; the body temperature rises, but it's not on purpose. Rather, the body's heating and cooling mechanisms become over-run, and the body cannot get rid of enough heat.