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.
People with blood-circulation problems such as varicose veins, for example, benefit by eating foods rich in omega-3 fatty acids because these unsaturated fatty acids stimulate blood flow and help break down fibrin, or blood clots, according to Shubhangini Joshi, author of Nutrition and Dietetics..