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.

Close-up of a person holding medicine in his palm

What Are the Most Toxic Vitamins?

Vitamins are needed to support a healthy body. In large amounts, however, certain vitamins can be toxic, leading to a condition called vitamin toxicity or vitamin poisoning. The dosage at which toxicity occurs, and the symptoms of toxicity, depend on the vitamin.

Read more →