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Comment by Un Ariete (un-ariete) on Taking vitamin D3 with K2 in the morning · 2019-08-20T21:33:00.108Z · LW · GW

Non lichen based D3 supplements have been found to contain toxic levels of D3 per pill. 200000ius per pill instead of 2000iu. It's in the scientific literature.

Insomnia is due to D3 inhibiting prostaglandin synthesis and the production of PGD2, which induces sleep.