3 ms·

I assumed too high a dose was dangerous. Is that not true?

• gojomo 16y ago
  At some point, yes. But as the linked article notes -- and as someone concerned about this enough to take a supplement and ask a question, you did read the article, right? -- adults have taken 10,000IU/day for 6 months with no ill effects, and 50,000IU/week is usual for people with a diagnosed deficiency until it's cured. So as for everything else, the dose makes the poison, but typical official recommendations (1000IU/day and lower) seem to be a fraction of what's best and a tiny fraction of what's safe.