Abstract

This study was designed to measure the effect of calcium supplementation from a dairy vs. calcium carbonate source on fecal fat excretion in overweight and obese adolescent boys and girls. Twenty girls (BMI 34+/−5 kg/m2) and fourteen boys (BMI 28 +/−5 kg/m2), aged 12–15 y, participated in two 3 week controlled feeding trials separated by a 3‐week washout period. Total dietary intakes during both sessions were eucaloric and macronutrient matched for energy needs. Intake included a basal diet containing 759 mg Ca/d plus frozen products based on soy protein with no added Ca (control) or the basal diet plus frozen products based on either dairy or soy protein containing added Ca (714 mg/d) in a cross‐over design. All urine and feces were collected during each session. Twenty‐four h diet and fecal samples were analyzed for Ca by inductively coupled plasma spectrophotometry. Crude fat of dried diet and feces was extracted using an automated Soxhlet type system. Fractional fecal fat was not influenced by increased Ca intake from dairy or CaCO3. However, pooled data indicated that fractional fecal fat excretion was positively related to fecal Ca excretion.Supported by NIH DK066108, National Dairy Council and test products were a gift from The Schwan Food Company.

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