Calcium is used in the Women’s Formula of the CardioTrim health supplement line.

References:

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11. Meunier PJ. Calcium, vitamin D and vitamin K in the prevention of fractures due to osteoporosis. Osteoporos Int. 1999;9 Suppl 2:S48-52.
12. Pfeifer M, Begerow B, Minne HW, Abrams C, Nachtigall D, Hansen C. Effects of a short-term vitamin D and calcium supplementation on body sway and secondary hyperparathyroidism in elderly women. J Bone Miner Res. 2000 Jun;15(6):1113-8.
13. Pines A, Katchman H, Villa Y, Mijatovic V, Dotan I, Levo Y, Ayalon D. The effect of various hormonal preparations and calcium supplementation on bone mass in early menopause. Is there a predictive value for the initial bone density and body weight? J Intern Med. 1999 Oct;246(4):357-61.
14. Recker RR, Davies KM, Dowd RM, Heaney RP. The effect of low-dose continuous estrogen and progesterone therapy with calcium and vitamin D on bone in elderly women. A randomized, controlled trial. Ann Intern Med. 1999 Jun 1;130(11):897-904.
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18. Scopacasa F, Horowitz M, Wishart JM, Need AG, Morris HA, Wittert G, Nordin BE. Calcium supplementation suppresses bone resorption in early postmenopausal women. Calcif Tissue Int. 1998 Jan;62(1):8-12.