Possible causes of inordinately cold hands and feet?

I’ve noticed that my hands and feet get unusually cold. I do believe I consume enough iron, but potentially not enough. They do not get so cold as to make me want to see a doctor about it, but I am concerned this is symptomatic of a larger disorder, so I am doing some preliminary online research. Any thoughts as to what may be causing this? I do ingest a good deal of coffee (1–2 cups/shots per day), but get enough sleep, exercise, and eat pretty healthy (low sugar/carbs, high protein, low saturated fats, low alcohol).