Journal
DIABETES-METABOLISM RESEARCH AND REVIEWS
Volume 24, Issue 1, Pages 41-51Publisher
WILEY
DOI: 10.1002/dmrr.755
Keywords
biotin; chromium; picolinate; diabetes; glucose; hemoglobin A(1c)
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Background Chromium and biotin play essential roles in regulating carbohydrate metabolism. This randomized, double-blind, placebo-controlled study evaluated the efficacy and safety of the combination of chromium picolinate and biotin on glycaemic control. Methods Four hundred and forty-seven subjects with poorly controlled type 2 diabetes (HbA(1c) >= 7.0%) were enrolled and received either chromium picolinate (600 mu g Cr+3) with biotin (2 mg), or matching placebo, for 90 days in combination with stable oral anti-diabetic agents (OADs). Major endpoints were reductions in HbA(1c), fasting glucose, and lipids. Safety and tolerability were assessed. Results Change in HbA(1c) was significantly different between treatment groups (p = 0.03). HbA(1c) in the chromium picolinate/biotin group decreased 0.54%. The decrease in HbA(1c) was most pronounced in chromium picolinate/biotin subjects whose baseline HbA(1c) >= 10%, and highly significant when compared with placebo (-1.76% vs -0.68%; p = 0.005). Fasting glucose levels were reduced in the entire chromium picolinate/biotin group versus placebo (-9.8 mg/dL vs 0.7 mg/dL; p = 0.02). Reductions in fasting glucose were also most marked in those subjects whose baseline HbA(1c) >= 10.0%, and significant when compared to placebo (-35.8 mg/dL vs. 16.2 mg/dL; p = 0.01). Treatment was well tolerated with no adverse effects dissimilar from placebo. Conclusions These results suggest that the chromium picolinate/biotin combination, administered as an adjuvant to current prescription anti-diabetic medication, can improve glycaemic control in overweight to obese individuals with type 2 diabetes; especially those patients with poor glycaemic control on oral therapy. Copyright (C) 2007 John Wiley & Sons, Ltd.
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