The feeling of coldness when one begins a Sunfood Diet is typically caused by a thickening of the blood during detoxification episodes; this decreases blood circulation. It is also caused by an increased blood flow to the internal organs - which are finally given a chance to heal - and a corresponding decreased blood flow to the extremities.
After you persist through the transition and detoxification - through the feeling of coldness - you will discover that your resistance to both cold and hot weather will increase by eating raw foods.
Eating hot food can actually decrease your resistance to cold weather in the same way that a hot shower decreases your resistance to the cold.
Paul Kouchakoff, the Swiss scientist who discovered that cooked food causes a white blood cell immune system reaction in the blood also discovered that water "corrupts" due to heat somewhere around 159° Fahrenheit (61° Celsius). This is valuable information for tea makers!
We can eat certain types of food to warm the system.
Fats warm the system. Fats contain the same elements as the carbohydrates, but the hydrogen is present in a much larger quantity, and this results in more heat being produced by its breakdown and digestion. Maca is a "fatty" vegetable superfood (usually powdered) that has incredible warming properties.
Potassium-rich foods are warming foods. Some nuts, such as macadamias, have a high level of potassium, as do seeds, such as sunflower seeds. Most fruits are rich in potassium. Some of the most warming, highest-potassium fruits are: avocados, dates, durians, persimmons (with seeds), prunes, pumpkin, raisins (with seeds), and sun-dried apricots. You will also notice that these fruits correspond to what is available in the fall and winter.
Sulfur-residue foods warm the body. Sulfur-residue foods include: cruciferous vegetables, garlic, and onions.