About 40% of U.S. adults do not meet the Estimated Average Requirement (EAR) for calcium. ¹
Adequate calcium intake is most effective when combined with vitamin D, magnesium, and other cofactors needed for bone metabolism. ²
Absorption matters: Calcium citrate is well absorbed, even without stomach acid, and can be taken with or without food.
1. National Institutes of Health, Office of Dietary Supplements (NIH ODS). Calcium: fact sheet for health professionals. Updated 2022. https://ods.od.nih.gov/factsheets/Calcium-HealthProfessional
2. Rizzoli R. Calcium and vitamin D supplementation ... . Bone. 2005;36(Suppl 2):S16-S20. doi:10.1016/j.bone.2004.09.011