Shiva Faghih; Mehdi Hedayati
Volume 3, Issue 2 , April 2015, , Pages 50-55
Abstract
Background: Although it is assumed that calcium has beneficial effects on weight loss, the interaction of calcium and iron would be a major concern. We did this study to investigate the effects of calcium and low-fat milk on serum ferritin in overweight or obese premenopausal women. Methods: Sixty-four ...
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Background: Although it is assumed that calcium has beneficial effects on weight loss, the interaction of calcium and iron would be a major concern. We did this study to investigate the effects of calcium and low-fat milk on serum ferritin in overweight or obese premenopausal women. Methods: Sixty-four healthy overweight or obese premenopausal women recruited in Shahid Beheshti University of Medical Sciences clinics participated in this clinical trial. Participants were randomly allocated to one of the following dietary regimens for 8 weeks: 1) a control diet providing a 500 kcal/day deficit, with 500-600mg/day dietary calcium; 2) a calcium- supplemented diet identical to the control diet with 800mg/day calcium carbonate 3) a milk diet providing a 500kcal/day deficit and containing three servings of low fat milk. Serum ferritin and anthropometric indices were measured at baseline and after 8 weeks. Primary outcome measure was serum ferritin level. Results: Mean±SD of baseline values for age, body mass index (BMI), waist circumference (WC), and serum ferritin were 37.44±9.46 (year), 30.79±3.63 (kg/m2), 88.04±8.90 (cm), and 59.20±47.8 (μg/l), respectively. There were no significant differences in baseline age, BMI, WC, and serum ferritin among 3 groups. Mean values of serum ferritin reductions were 0.26±20.36, 14.59±17.07 and6.57±25.93 (μg/l) in control, calcium, and milk groups, respectively. Reduction in serum ferritin was only significant in the calcium group (P=0.003). Serum ferritin reductions were not significantly different among the 3 groups (P=0.260). Conclusion: An energy-restricted diet in combination with calcium supplement or low-fat milk does not induce any additional adverse effect on iron status, compared to an energyrestricted diet alone.
Shiva Faghih; Alireza Abadi; Mehdi Hedayati; Seyed Masoud Kimiagar
Volume 2, Issue 3 , July 2014, , Pages 88-92
Abstract
Background: Obesity and metabolic syndrome are serious public health problems. It is suggested that high calcium diet can improve lipid profile, blood pressure and insulin resistance.Methods: In this clinical trial, 75 healthy overweight or obese premenopausal women were randomly allocated to one of ...
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Background: Obesity and metabolic syndrome are serious public health problems. It is suggested that high calcium diet can improve lipid profile, blood pressure and insulin resistance.Methods: In this clinical trial, 75 healthy overweight or obese premenopausal women were randomly allocated to one of the following dietary regimens for 8 weeks: 1) a control diet 2) a calcium-supplemented diet containing 800mg/d calcium carbonate 3) a high milk diet containing three servings of low fat milk (all of them providing a 500kcal/day deficit). At baseline and after 8 weeks, waist circumference (WC), blood pressure, serum triglyceride (TG), fasting blood sugar (FBS), and high density lipoprotein cholesterol (HDL-C) were measured.Results: After 8 weeks, WC, FBS and HDL-C decreased in all groups (P<0.001), but there were no significant reduction in TG and blood pressure. Reduction of WC in the milk group was significantly higher than the controls (P=0.028). Also, reduction of HDL-C in the calcium and milk groups was less than the controls (P=0.023 and P=0.019, respectively). Changes in FBS, TG and blood pressure were not significantly different among the 3 groups.Conclusion: We found that increasing milk consumption led to more WC reduction. Milk or calcium intake caused less adverse effect on HDL-C, but has no effect on the blood pressure, FBS and TG. So increase in milk or calcium intake can reduce WC among the metabolic syndrome complications.