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Dr. Heaney compares the calcium in fortified beverages to the calcium found in milk.
Dr. Heaney:
The calcium in milk compares to the calcium-fortified vegetables simply in its company. The calcium in milk comes in with phosphorus and protein and vitamin D and potassium and magnesium, and the calcium in the calcium-fortified vegetables comes in basically with none of those, maybe one or two, but certainly not protein and protein is absolutely essential for bone health.
Calcium has been shown not to work at all in women who don’t have an adequate protein intake and the reason is, you can’t make bone out of just mineral. You have to make bone out of a protein matrix, the form into which the mineral is deposited. So you need both and you don’t get that with a calcium-fortified beverage.
About Dr. Heaney, M.D., F.A.C.P, F.A.C.N.:
Dr. Robert Heaney is an internationally recognized expert in the field of bone biology and calcium nutrition. He has worked for over 45 years in the study of osteoporosis and calcium physiology, and has published more than 300 original papers, chapters, monographs, and reviews in scientific and educational fields. He is a frequently invited editorial writer for the major medical journals, including JAMA, the American Journal of Clinical Nutrition, Annals of Internal Medicine, Clinical Chemistry, Metabolism, and the Journal of Clinical Endocrinology and Metabolism. He serves on numerous nutrition industry scientific advisory panels.
Visit Dr. Heaney at the Osteoporosis Research Center:
http://osteoporosis.creighton.edu/bio_faculty/dr_heaney.htm