.body cold might be thyroid issue and then Iodine will help
.cold hands and feet is definitely related to blood circulation issues. Nettle and ginger are great for blood cleansing. Nettle tea or simply into soup (liquid assimilates better). Ginger: chop a few slices ( I am lazy and I dont bother peeling it) boil into water for 15 minutes and drink as tea. You may put the sliced ginger into the freezer to avoid wasting it and put i frozen into the pan.