PT - JOURNAL ARTICLE AU - Holly P. Kilim AU - Harold Rosen TI - Optimizing calcium and vitamin D intake through diet and supplements AID - 10.3949/ccjm.85a.17106 DP - 2018 Jul 01 TA - Cleveland Clinic Journal of Medicine PG - 543--550 VI - 85 IP - 7 4099 - http://www.ccjm.org/content/85/7/543.short 4100 - http://www.ccjm.org/content/85/7/543.full SO - Cleve Clin J Med2018 Jul 01; 85 AB - Calcium, a key component of bone, is obtained through diet or supplements, or both, and vitamin D is necessary for normal calcium absorption. Controversy exists as to the efficacy and even the safety of calcium. Our opinion, backed by studies and guidelines, is that adequate amounts of calcium are a must for patients concerned about bone health, and cardiovascular safety is not a concern.