I take 500mg before sleep every night. It improved my deep sleep. Before taking it, I had sporadic deep sleep episodes, averaging in 1h:07m/night. After taking magnesium, my deep sleep became much more stable and avg increased to 1h:20m/night
This one lacks any studies proving its effectiveness.
D3
Well, I'm a geek. I spend most of my time inside.
Personalized multi-vitamin
From Rootine, doing a quarterly blood test. I'm not convinced about the usefulness of this kind of supplementation, but I haven't had time to experiment with not taking it.