The body has not adjusted to taking in foods that are at room temperature. People consume foods that are cold from refrigeration. This lowers the body's core temperature. Always keep your refrigerator at the highest possible temperature it will allow. Also, seek out and purchase humid-air refrigerators.
Most refrigerators are dry deserts inside that wilt vegetables.
Generally, fruit does not need any refrigeration. What to do and eat to keep yourself warm in winter. Raise your core temperature by regularly enjoying hot baths, saunas, sweat lodges, and hot spring visits. Find foods that are warming for you. One woman I met in Telluride told me that wheatgrass juice raises her body temperature.