Don't Mix Calcium With Iron

Monica Reinagel, MS, LD/N, CNS
1-minute read

Quick Tip: Calcium Interferes with Iron Absorption

If you take a multivitamin containing iron (or an iron supplement) and you take a calcium supplement, it’s a good idea to take them at different times. High doses of calcium, especially calcium carbonate, the form found in most supplements, can block the absorption of iron.

Try taking your multivitamin with breakfast and your calcium supplement at dinner or before bed. Taking calcium late in the day can also help you relax and fall asleep more easily.


Vitamins image courtesy of Shutterstock

About the Author

Monica Reinagel, MS, LD/N, CNS

Monica Reinagel is a board-certified licensed nutritionist, author, and the creator of one of iTunes' most highly ranked health and fitness podcasts. Her advice is regularly featured on the TODAY show, Dr. Oz, NPR, and in the nation's leading newspapers, magazines, and websites. Do you have a nutrition question? Call the Nutrition Diva listener line at 443-961-6206. Your question could be featured on the show.