Japanese medical researchers have found that eating more of the roots and peels of vegetables can make people stronger and strengthen their body's resistance to cold. The researchers explained that the roots and skins of vegetables are rich in various minerals and nutrients, and how much the body absorbs minerals is closely related to its health and ability to keep out the cold. For example, when the body is deficient in zinc, body temperature drops and it feels cold. This is especially true for women. Japanese medical experts advise people to properly eat more root-skinned vegetables such as carrots, sorghum, hawthorn, and potatoes in the cold winter.