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.
Foods to Increase Red Blood Cells. Eating the right foods can help increase the number of red blood cells in your body. Here are a few of the ways you can eat your way to better blood cell health: 1  Iron. 2  Food rich in iron can help your body rebuild what it has lost. 3  Lentils and legumes are a great way to get the iron you need and they are healthy for you in many other ways, too. 4  Copper.