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There is a chance your employer will pick up at least some of the cost because doing so may help in employee recruitment and retention
More research, especially from randomized controlled trials, is needed to determine whether vitamin D deficiency has adverse effects on cognition
It's a hormone your intestines release when you eat
While you can supplement with a bit more than this (many supplements have 15 to 30 mg), you should not exceed the tolerable upper intake of 40 mg per day from food and supplements combined, unless supervised by a doctor
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