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Effects of glucose and glucose polymers on calcium absorption in healthy subjects.

Glucose polymers have been shown to enhance intestinal calcium absorption in normal subjects as well as in patients with gastrointestinal disease. Glucose polymers are widely used as an energy source in enteral nutritional supplements and infant formulas. In this study, eight normal subjects underwent 47Ca absorption tests to compare the effect on calcium absorption of carbohydrate given orally as a simple carbohydrate (glucose) or a more complex carbohydrate (glucose polymers). Oral coadministration of glucose with calcium increased the efficiency of intestinal calcium absorption by 20% and coadministration of glucose with glucose polymers increased calcium absorption by 27%. This suggests that glucose, derived from glucose polymers by hydrolysis, may be responsible for the positive effect of polymers on calcium absorption. The potential positive effect of coadministration of carbohydrate on calcium bioavailability deserves considerations in the design of calcium supplementation strategies.