Cold hands/feet is usually caused by being deficient in iodine.
Most people are deficient in iodine and don't even know it. The RDA is 150 micrograms per day, but like most supplements, this amount is too low to be of any value.
Get some Lugols iodine, which is 5% iodine and 10% potassium chloride mixed with 85 parts pure water, and take about 20 drops per day. That should equal about 40 to 50 milligrams per day, which is high enough to be beneficial.
Mainstream says these amounts of iodine are toxic, however, they are wrong.... as usual.
Let Food Be Your Medicine And Medicine Be Your Food.(Hippocrates)