alt Hacker NewsGood article, but it does not cover toxicity; you can take too much vitamin D and this has very negative affects. Usually a multivitamin is enough for supplementing; taking extra is where you can run into issues; consult your Doctor.
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alexnewman • yesterday at 6:06 PM
Evidence that multivitamin d is useful?
IIRC, toxicity is very rare even in very high doses (like 20 k IU a day) for weeks/ two or so months.