Bones

[Cataboo]

and yet, there are these:

http://www.ncbi.nlm.nih.gov/pubmed/12856112
http://www.ncbi.nlm.nih.gov/pubmed/10949001
http://www.ncbi.nlm.nih.gov/pubmed/19127198

Admittedly, all studies of male athletes. But I don't think it's time to hang up your running shoes or jump ropes yet. Calcium uptake doesn't automatically translate into stronger bones.

This one's female:
http://www.ncbi.nlm.nih.gov/pubmed/10997953?ordinalpos=1&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_DiscoveryPanel.Pubmed_Discovery_RA&linkpos=2&log$=relatedarticles&logdbfrom=pubmed