Talk:Optimum Daily Intake
It is real. It was deleted from Wikipedia, because of notability claims, and because other recommendations exist. Sole contributor as of when it was posted here. Star6763 (discuss • contribs) 16:12, 10 September 2013 (UTC)
While the recommended daily intake of Vitamin-D to prevent Rickets may range from 50-800IU depending on the region this is no longer agreed on as an optimum daily intake.
The optimum daily intake varies from 2000-10'000IU daily depending on what metabolism the researcher was targeting.
To suggest that optimum is 400IU leaves a lot to be desired.