The Caltrate brand is supplied in many different formulas; calcium carbonate (NOT calcium citrate) is the common ingredient serving as the calcium supplement source. Caltrate contains 600 mg of calcium carbonate as opposed to 200 mg in a typical multivitamin product. Caltrate Plus also contains 800 IU of vitamin D (cholecalciferol), 20 mcg vitamin K1, 50 mg magnesium, 7.5 mg zinc oxide, 1 mg copper, and 1.8 mg of manganese (II) sulfate monohydrate.
- Xia, Wei-bo; Zhang, Zhong-lan; Wang, Hong-fu; Meng, Xun-wu; Zhang, Ying; Zhu, Guo-ying; Xing, Xiao-ping; Liu, Jian-li; Wang, Li-hua; Jiang, Yan; Weng, Shi-fang; Xu, Tao; Hu, Ying-ying; Yu, Wei; Tian, Jun-ping (2009). "The efficacy and safety of calcitriol and/or Caltrate D in elderly Chinese women with low bone mass". Acta Pharmacologica Sinica. Springer Science and Business Media LLC. 30 (3): 372–378. doi:10.1038/aps.2009.12. ISSN 1671-4083. PMC 4085656.
- Caltrate: Pfizer Consumer Healthcare Archived March 25, 2012, at the Wayback Machine
- "Caltrate PLUS | Caltrate". www.caltrate.ca. Retrieved 2018-08-18.