Extra Vitamin D May Ease Crohn's Symptoms, Study Finds

Improvements reported in muscle strength, fatigue and quality of life

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White said supplements are inexpensive and safer than too much sun exposure. A daily intake of 2,000 IUs is considered safe, he said. The safe upper limit for adults is 4,000 IUs, according to the NIH.

The data and conclusions of research presented at medical meetings should be viewed as preliminary until published in a peer-reviewed journal.

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To learn more about vitamin D, visit the U.S. National Institutes of Health.

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