• J. Clin. Endocrinol. Metab. · Jun 2012

    Randomized Controlled Trial

    Improvement of vitamin D status via daily intake of fortified yogurt drink either with or without extra calcium ameliorates systemic inflammatory biomarkers, including adipokines, in the subjects with type 2 diabetes.

    • Tirang R Neyestani, Bahareh Nikooyeh, Hamid Alavi-Majd, Nastaran Shariatzadeh, Ali Kalayi, Nima Tayebinejad, Soudabeh Heravifard, Shabnam Salekzamani, and Malihe Zahedirad.
    • Laboratory of Nutrition Research, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, 1981619573 Tehran, Iran. t.neyestani@nnftri.ac.ir
    • J. Clin. Endocrinol. Metab. 2012 Jun 1; 97 (6): 2005-11.

    ContextSystemic inflammation is thought to have a central role in diabetic long-term complications.ObjectiveThe aim of this study was to investigate the effects of vitamin D either with or without extra calcium on certain inflammatory biomarkers in the subjects with type 2 diabetes (T2D).Design, Setting, And ParticipantsThis was a double-blind, randomized, controlled trial conducted over 12 wk in 90 T2D subjects aged 30-60 yr from both sexes.InterventionSubjects were randomly allocated to one of three groups to receive two 250-ml bottles a day of plain Persian yogurt drink or doogh (PD, containing 150 mg calcium and no detectable vitamin D(3)/250 ml), vitamin D-fortified doogh (DD, containing 500 IU vitamin D(3) and 150 mg calcium/250 ml), or calcium + vitamin D(3)-fortified doogh (CDD, containing 500 IU vitamin D(3) and 250 mg calcium/250 ml).Outcome MeasuresThe changes in inflammatory markers were evaluated.ResultsCompared to the baseline values, highly sensitive C-reactive protein, IL-1β, IL-6, fibrinogen, and retinol binding protein-4 concentrations significantly decreased in both the DD and CDD groups. Although the decrement in highly sensitive C-reactive protein and fibrinogen was more in CDD compared to DD (-4.0 ± 8.5 vs. -1.3 ± 2.8 mg/liter, and -0.40 ± 0.74 and -0.20 ± 0.52 mg/liter, respectively), the differences were not significant. There was a significant increase in serum adiponectin in both the DD and CDD groups (51.3 ± 65.3 vs. 57.1 ± 33.8 μg/liter; P < 0.05). Mean adiponectin changes in CDD were significantly higher than in PD (P = 0.021).ConclusionsDaily intake of vitamin D-fortified doogh improved inflammatory markers in T2D subjects, and extra calcium conferred additional benefit only for the antiinflammatory adipokine, i.e. adiponectin.

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