Supplements Guide: Side Effects & Best Multivitamins

Vitamins and supplements like melatonin and fish oil offer health benefits but can cause side effects if misused. Learn about the impact of saw palmetto on blood pressure and find the best multivitamins for young women and adults over 50.

Woman Suffering From Stomachache In Bed

Can a Vitamin D Supplement Cause Cramping and Diarrhea?

In healthy people, vitamin D is not generally known to cause cramping and diarrhea when taken at doctor-recommended doses and as a single agent. Excessive amounts of vitamin D, however, can lead to toxicity and related symptoms, some of which are gastrointestinal.

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