12.01.11
Nutraceutical: Calcium
Indication: Weight loss
Source: Am J Clin Nutr, November 2011;94(5):1163-70.
Research: In this study, researchers wanted to determine the effect of doubling habitual calcium intake to the recommended intake from dairy or calcium carbonate on energy balance and purported mechanisms, including fecal fat excretion, macronutrient use and hormone suppression. Twenty-five girls with a mean BMI (in kg/m(2)) of 33 ± 5 and 17 boys with a BMI of 28 ± 5, aged 12-15 years, participated in two 3-week controlled feeding sessions that used a crossover design in random order. In one session, 756 mg Ca/d was consumed; in the other session, an additional 650 mg Ca/d was provided as dairy or calcium carbonate supplements that were matched to the control in macronutrient content. Total energy and macronutrient intakes were controlled and were the same for the 2 sessions for each subject. Primary outcome measures were energy balance, fecal fat excretion, lipid oxidation and postprandial energy expenditure.
Results: There were no effects of quantity or source of calcium on energy or fat balance, despite calcium-induced increases in postprandial serum parathyroid hormone suppression. Researchers believe these data lend little evidence to support the proposed mechanisms for the relation between an increase in calcium intake from calcium carbonate or dairy and weight loss or weight maintenance in children.
Indication: Weight loss
Source: Am J Clin Nutr, November 2011;94(5):1163-70.
Research: In this study, researchers wanted to determine the effect of doubling habitual calcium intake to the recommended intake from dairy or calcium carbonate on energy balance and purported mechanisms, including fecal fat excretion, macronutrient use and hormone suppression. Twenty-five girls with a mean BMI (in kg/m(2)) of 33 ± 5 and 17 boys with a BMI of 28 ± 5, aged 12-15 years, participated in two 3-week controlled feeding sessions that used a crossover design in random order. In one session, 756 mg Ca/d was consumed; in the other session, an additional 650 mg Ca/d was provided as dairy or calcium carbonate supplements that were matched to the control in macronutrient content. Total energy and macronutrient intakes were controlled and were the same for the 2 sessions for each subject. Primary outcome measures were energy balance, fecal fat excretion, lipid oxidation and postprandial energy expenditure.
Results: There were no effects of quantity or source of calcium on energy or fat balance, despite calcium-induced increases in postprandial serum parathyroid hormone suppression. Researchers believe these data lend little evidence to support the proposed mechanisms for the relation between an increase in calcium intake from calcium carbonate or dairy and weight loss or weight maintenance in children.