When I was thinking more about your message it clicked in my head how moreless always talked about the Adrenals and sodium. Sodium is the mineral most needed by the adrenal glands for proper functioning. Poorly functioning adrenal glands can lead to the fatigue.
So it all adds up. The fatigue and the cold are most likely both connected to a need for natural sodium.
When I was eating mostly raw foods and not quite understanding the sodium potassium ratio, I would be freezing all the while eating really high potassium foods like dates and raw honey.
Search the forum for adrenals for moreless' posts.