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Vitamin D needed for many months to reduce blood pressure – RCT Nov 2013

From CardioSmart


Announced at American Heart Association Scientific Sessions in Dallas.

The DAYLIGHT Study (Vitamin D therapy in individuals at high risk of hypertension), was stopped after 6 months with 4,000 IU of vitamin D when there was no reduction in blood pressure.


For many people who are very vitamin D deficient a constant dose of 4,000 IU takes many months to restore vitamin D levels.
Suspect that the trail was stopped just when vitamin D levels could start reducing blood pressure.

See also VitaminDWiki