How Iron interacts with calcium

Interaction type: Interactions

Interaction rating: Study Supported

Calcium has been reported to decrease iron absorption. Supplementation with affected nutrient may be necessary. (1)


  1. View Abstract: Hallberg L, et al. Calcium: Effect of Different Amounts on Nonheme- and Heme-iron Absorption in Humans. Am J Clin Nutr. Jan1991;53(1):112-19.