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. 2012:2012:581432.
doi: 10.1155/2012/581432. Epub 2012 Jun 26.

Macronutrient intake influences the effect of 25-hydroxy-vitamin d status on metabolic syndrome outcomes in african american girls

Anna L Newton  1 , Lynae J Hanks, Ambika P Ashraf, Elizabeth Williams, Michelle Davis, Krista Casazza
Affiliations

Macronutrient intake influences the effect of 25-hydroxy-vitamin d status on metabolic syndrome outcomes in african american girls

Anna L Newton et al. Cholesterol. 2012.

Abstract

The objectives were to determine the effect of macronutrient modification on vitamin D status and if change in 25-hydroxy-vitamin D concentration influences components of metabolic syndrome in obese African American girls. Methods. Five-week intervention using reduced CHO (43% carbohydrate; 27% fat: SPEC) versus standard CHO (55% carbohydrate; 40% fat: STAN) eucaloric diet. Subjects were 28 obese African American females, aged 9-14 years. Dual energy X-ray absorptiometry and meal test were performed at baseline and five weeks. Results. Approximately 30% of girls had metabolic syndrome. Serum 25OHD increased in both groups at five weeks [STAN: 20.3 ± 1.1 to 22.4 ± 1.1 (P < 0.05) versus SPEC: 16.1 ± 1.0 to 16.8 ± 1.0 (P = 0.05)]. The STAN group, increased 25OHD concentration over five weeks (P < 0.05), which was positively related to triglycerides (P < 0.001) and inversely associated with total cholesterol (P < 0.001) and LDL (P < 0.001). The SPEC group, had increase in 25OHD (P = 0.05), which was positively related to fasting insulin (P < 0.001) and insulin sensitivity while inversely associated with fasting glucose (P < 0.05). The contribution of vitamin D status to metabolic syndrome parameters differs according to macronutrient intake. Improvement in 25OHD may improve fasting glucose, insulin sensitivity, and LDL; however, macronutrient intake warrants consideration.

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Figures

Figure 1
Figure 1
Components of metabolic syndrome at baseline and five weeks. *Indicates significant difference between diet groups (P < 0.5). Abbreviations: circulating vitamin D (25OHD), triglycerides (TGs), cholesterol (Chol), high-density lipoprotein (HDL), low-density lipoprotein (LDL), fasting glucose (Glu), insulin sensitivity (SI), and insulin (Ins).
Figure 2
Figure 2
Diet group evaluations related to MetSyn components. *Indicates significant differences between baseline and five weeks (P < 0.05). Abbreviations: circulating vitamin D (25OHD), triglycerides (TGs), cholesterol (Chol), high-density lipoprotein (HDL), low-density lipoprotein (LDL), fasting glucose (Glu), insulin sensitivity (SI), and insulin (Ins).
Figure 3
Figure 3
Circulating 25OHD levels at baseline and five weeks in the presence or absence of MetSyn.
See this image and copyright information in PMC

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