Calcium bioavailability from calcium fortified food products.
The calcium balance of 12 presumed healthy human young adult subjects was assessed. Subjects consumed a constant laboratory-controlled diet supplemented with one of four calcium-fortified food products: orange juice (OJ), milk (M), experimental pasteurized processed cheese (T), soda (S), or a calcium carbonate plus vitamin D tablet (CC). Study length was 6 weeks with seven-day experimental periods (2-days allowed for adjustment with 5-days combined for purposes of analysis). All urine and fecal samples were collected by the subjects for the duration of the study. Blood samples were drawn at the end of each experimental period. Urine and fecal calcium contents were determined. Blood samples were analyzed for alkaline phosphatase. Results of this study indicate a higher fecal calcium content (mg/day) when subjects consumed CC and T, and when subjects consumed self-selected diets, than when given S, M, or OJ. Urinary calcium excretion was significantly lower when subjects consumed OJ than when they consumed M, T, or their self-selected diets. A significantly larger positive calcium balance was demonstrated when subjects consumed OJ as compared to T. Fecal transmit time did not vary significantly. Serum alkaline phosphatase was significantly lower when subjects consumed T than when they consumed self-selected diets.
Kohls
K
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Department of Family and Consumer Sciences, Nutrition and Food Systems Area, Miami University, Oxford, Ohio 45056.
D000328:Adult; D000818:Animals; D001628:Beverages; D001682:Biological Availability; D002118:Calcium / Q000008:administration & dosage / Q000493:pharmacokinetics* / Q000652:urine; D002119:Calcium Carbonate; D002253:Carbonated Beverages; D002611:Cheese; D002957:Citrus; D005243:Feces; D005260:Female; D005502:Food; D006801:Humans; D008297:Male; D008892:Milk; D014807:Vitamin D
D014807:Vitamin D; D002119:Calcium Carbonate; D002118:Calcium