A member asked:

Will vitamin d supplement cause constipation?

A doctor has provided 1 answer
Dr. Ian Bach answered

Yes: Vitamin d has been reported to cause constipation. In your case, there is no blood test to determine if constipation is caused by vitamin d. It would be reasonable to stop the vitamin d for 1-2 weeks to see if the constipation resolves. If it does, you are likely confirming this as a side effect.

Answered 10/31/2018

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