Body temperature is determined by the body's thermoregulatory set-point. The body increases this set-point in response to threats such as bacterial or viral infections. When this set-point rises, a fever occurs and the body perceives itself as suffering from hypothermia (colder than it should be).
What You Can Eat. That depends on your blood type. Type O blood: A high-protein diet heavy on lean meat, poultry, fish, and vegetables, and light on grains, beans, and dairy. D'Adamo also recommends various supplements to help with tummy troubles and other issues he says people with type O tend to have.
Potassium helps maintain normal blood pressure and also helps muscles, including the heart, to contract properly. Foods rich in potassium can lower the risk of heart disease, stroke, and high blood pressure. Talk to your doctor before making drastic changes to your diet, though. Here are foods that are especially high in potassium, listed from those with the highest amount to those that have less (but still high) amounts.