The joint effect of energy reduction with calcium supplementation on the risk factors of type 2 diabetes in the overweight population: a two-year randomized controlled trial
AGING-US(2021)
Abstract
Both excessive energy intake and low calcium intake are inversely associated with the aging-related diseases, particularly for type 2 diabetes mellitus(T2DM). This study examined whether energy reduction coupled with calcium supplementation aided in the prevention of T2DM among the overweight population. A randomized controlled trial(RCT) of 1021 overweight participants was performed, in which participants were randomly assigned to 4 groups: 1) energy-reduction group(ERG), 2) calcium supplementation group(CSG), 3) energy-reduction with calcium supplementation group(ER-CSG), 4) control group(CG). Nutritional habits, anthropometric and diabetes-related indicators were measured at baseline and each follow-up time. To analyze the separate effects of dietary energy-reduction and calcium supplementation, ERG and ER-CSG were integrated into ERGs. Similarly, CSG and ER-CSG were integrated into CSGs. Compared to the non-energy reduction groups(NERGs), ERGs had lower values of Delta BMI(-0.9kg/m(2)), Delta FSG (-0.34mmol/L), Delta HbA1c(0.16%), and Delta HOMA-IR(-0.13), and higher value of Delta Gutt index(-5.82). Compared to the non-calcium supplementation groups(NCSGs), the Delta Gutt index(-5.46) in CSGs showed a significant decrease. Moreover, these risk factors for T2DM were most effectively ameliorated in ER-CSG group with the decreased values of Delta FSG(-0.42mmol/L), Delta Gutt index(-0.73), and the slowest increasing rate value of Delta 2h-glucose(0.37mmol/L). This RCT demonstrated that energy-reduction with calcium supplementation was a useful dietary intervention strategy for preventing the development of T2DM in the overweight population.
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Key words
energy reduction,calcium supplementation,joint effect,RCT,T2DM
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