How to take vitamin d correctly

Research links vitamin D levels to sleep quality.

In fact, several studies associate low levels of vitamin D in your blood to a higher risk of sleep disturbances, poorer sleep quality, and reduced sleep duration (, , ).

Conversely, one small study in 2013 suggested that higher blood levels of vitamin D may be linked to lower levels of melatonin — the hormone responsible for regulating your sleep cycle — in people with multiple sclerosis ().

Another study in postmenopausal females found that sleep quality actually decreased when vitamin D levels were repleted with a daily dose of 2,000 IU.

So far, no other research has produced similar results ().

Some anecdotal reports also claim that taking vitamin D at night can negatively influence sleep quality by interfering with melatonin production.

However, scientific research to determine how supplementing with vitamin D at night may affect sleep is currently unavailable.

Until studies exist, it may be best to simply experiment and find what works best for you.

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