[helph67]

I agree with the 4 suggestions under "Unintuitive New Invariants" but add consider taking magnesium just before bed. My experience is that it helps the whole body relax, enabling sleep to be more easily achieved. Discuss it with your G.P first.

[hinkley]

I learned recently that magnesium absorption through the skin is part of how epsom salt (MgSO4) baths “work”.

Also Sulfate bioavailability is why people take MSM for arthritis, so it’s a twofer.