Calcium Absorption and Estrogen Activity - Exchange between bone calcium and blood serum calcium, effect of estrogen, chelates, nonchelates, acid/alkaline balance, and a successful clinical study.
Calcium: Nutrition for Healthy Bones - Information regarding the role of dietary calcium and exercise to maintain healthy bones written by registered dietitians.
Calciuminfo.com - Online calcium resource from the makers of Tums.
Caltrate - Information on this company's calcium supplements.
Carbonated Water and Calcium - Dr. Donnica Moore discusses carbonated water and caffeinated beverages' effects on calcium levels in this question and answer format.
The EF-Hand Calcium-Binding Proteins Data Library - Home of the calcium-binding protein database. Structure determination of calcium-binding proteins and nucleic acid fragments in solution by nuclear magnetic resonance.