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Free Radic Biol Med. 2007 Oct 15; 43(8): 1124–1131.
Effect of Chromium Niacinate and Chromium Picolinate Supplementation on Lipid Peroxidation, TNF-α, IL-6, CRP, Glycated Hemoglobin, Triglycerides and Cholesterol Levels in blood of Streptozotocin-treated Diabetic Rats
Sushil K. Jain, Justin L. Rains, and Jennifer L. Croad


Chromium (Cr3+) supplementation facilitate normal protein, fat and carbohydrate metabolism, and is widely used by public in many countries. This study examined the effect of chromium niacinate (Cr-N) or chromium picolinate (Cr-P) supplementation on lipid peroxidation (LP), TNF-α, IL-6, CRP, glycosylated hemoglobin (HbA1), cholesterol and triglycerides (TG) in diabetic rats. Diabetes (D) was induced in Sprague Dawley rats by streptozotocin (STZ) (ip, 65 mg/kg BW). Control buffer, Cr-N or Cr-P (400 µg Cr/Kg BW) was administered by gavages daily for 7 wks. Blood was collected by heart puncture using light anesthesia. Diabetes caused a significant increase in blood levels of TNF-α, IL-6, glucose, HbA1, cholesterol, TG and LP. Compared with D, Cr-N supplementation lowered the blood levels of TNF-α (p=0.04), IL-6 (p=0.02), CRP (p=0.02) LP (p=0.01), HbA1 (p=0.02), TG (p=0.04) and cholesterol (p=0.04). Compared with D, Cr-P supplementation showed a decrease in TNF-α (p=0.02), IL-6 (p=0.02) and LP (p=0.01). Chromium niacinate lowers blood levels of pro-inflammatory cytokines (TNF-α, IL-6, CRP), oxidative stress and lipids levels in diabetic rats, and appears to be more effective form of Cr3+-supplementation. This study suggests that Cr3+-supplementation can lower risk of vascular inflammation in diabetes.


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