Objective: This study evaluated the effects of Vitamins D, B9, and B12 given individually or combined in ameliorating some biochemical parameters related to endothelial dysfunction in diabetic rats.Methods: A total of 50 Sprague-Dawley male rats were divided into five groups: Control, diabetic, diabetic received Vitamin D, diabetic received Vitamins B9 and B12, and diabetic received Vitamins B9, B12, and D. At the end of 6 weeks, the rats were sacrificed and a set of assays was carried out to determine: Fasting blood sugar (FBS), lipid profile, nitric oxide (NO), homocysteine (Hcy), malondialdehyde (MDA), and serum levels of Vitamins B9, B12, and D.Results: Diabetic rat received Vitamin D and diabetic rat received Vitamins B9 and B12 had a significant decline in the levels of FBS, lipid profile, and Hcy with reduced MDA (p<0.05) release but significant increase in NO level. On the same hand, diabetic rat received combined supplementation of Vitamins B9, B12, and D had more pronounced effect (p<0.00).Conclusion: Given these findings, the combined vitamins therapy had antiatherosclerotic effects by inhibiting lipid peroxidation and stimulating NO production, resulting in amelioration the endothelial dysfunction in diabetic rat.
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