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).
Additional Readings. Hyperthermia and Hypothermia Digestive Hyperthermia If heat gain exceeds the ability of the body to lost heat, then body temperature increases above normal levels, a condition called hyperthermia.Hyperthermia can result from exposure to hot environments, exercise, fever, and anesthesia.dditional Readings. Hyperthermia and Hypothermia Digestive Hyperthermia If heat gain exceeds the ability of the body to lost heat, then body temperature increases above normal levels, a condition called hyperthermia.