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Also, just curious, when you say you can't sleep, how are you feeling

Common causes include hormonal changes, polycystic ovary syndrome (PCOS), the use of birth control pills, and thyroid dysfunction

These are not just random unease

Cautions DO NOT TAKE large doses of vitamins (megadoses or megavitamin therapy) unless directed to by your doctor
doi:10.1186/s12970-017-0176-9 Lewis EJH, Perkins BA, Lovblom LE, Bazinet RP, Wolever TMS, Bril V