I found myself puzzled by the majority of responses in a recent question on controlling anxiety and have to ask:
How is it "paleo" to be prescribing magnesium and other supplementation to address anxiety?
[Incidentally there is only pre-clinical (animal research) evidence to date to support that magnesium is better than placebo.]
In my view, if indeed there is a (correctly diagnosed) nutritional deficiency then the "paleo" method should ideally be to address with a whole food and/or activity prior to resorting to supplementation.
For example, a vit D deficiency can be addressed by eating salmon (whole food) and/or exposure to sun (activity).