Why it matters: Magnesium supports vital body functions, but excess intake—especially from supplements—can lead to severe health issues, particularly in people with kidney problems. What to watch: ...

Medically reviewed by Allison Herries, RDNYou may develop side effects like diarrhea and stomach pain while taking magnesium.Signs of magnesium toxicity include low blood pressure and muscle weakness.

Magnesium is a valuable mineral for many reasons. Found in peanut butter, oatmeal, black beans, brown rice, yogurt, bananas and more, it can help with a variety of health concerns. For example, maybe ...