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American Journal of Clinical Nutrition, Vol 48, 1219-1225, Copyright © 1988 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Comparative effects of meals high in protein, sucrose, or starch on human mineral metabolism and insulin secretion

MG Holl and LH Allen
Department of Nutritional Sciences, University of Connecticut, Storrs.

Protein, carbohydrates, and amino acids produce calciuria by decreasing renal calcium reabsorption. This study compared the postprandial calciuretic and serum insulin responses of 12 adults to isocaloric meals: Control, High Protein, High Sucrose, and High Starch. In 3 h 60% more Ca was excreted after High Protein than after other meals; renal Ca reabsorption was lower after High Protein than after High Sucrose at 2.5 h and after High Starch and High Sucrose at 3 h (p less than 0.01). Insulin was higher after High Starch and High Sucrose than after High Protein. Urinary phosphorus excretion was lower 1-3 h after High Protein than after other meals (p less than 0.01). High Protein increased urinary potassium and zinc. Urinary Ca correlated significantly with urinary Zn (r = 0.64) and sodium (r = 0.62), peak serum P (r = -0.29), and serum insulin increase for Control (r = 0.70) and High Protein (r = 0.68) only. Insulin inhibition of Ca reabsorption is not the sole explanation of macronutrient-induced calciuria.


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T. L. Duff and S. J. Whiting
Calciuric Effects of Short-Term Dietary Loading of Protein, Sodium Chloride and Potassium Citrate in Prepubescent Girls
J. Am. Coll. Nutr., April 1, 1998; 17(2): 148 - 154.
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Copyright © 1988 by The American Society for Nutrition