Clinical Study to Assess the Efficacy and Safety of a Citrus Polyphenolic Extract of Red Orange, Grapefruit, and Orange (Sinetrol‐XPur) on Weight Management and Metabolic Parameters in Healthy Overweight Individuals

The present study investigated the efficacy and safety effects of Sinetrol‐XPur (polyphenolic citrus dry extract) in weight management; metabolic parameters; and inflammatory, glycemic and oxidative status. In a 12‐week, randomized, double‐blind, placebo‐controlled trial, Sinetrol‐XPur was given to overweight subjects twice daily with meals in the tested group ( N = 47) versus a placebo group ( N = 48). Waist and hip circumference and abdominal fat were decreased in the Sinetrol‐XPur group as compared with the placebo group ( p < 0.0001) (−5.71% vs −1.56% for waist, −4.71% vs −1.35% for hip and −9.73% vs −3.18% for fat). Inflammatory markers were reduced (C‐reactive protein: −22.87% vs +61%; fibrinogen: −19.93% vs −1.61%, p < 0.01). Oxidative stress was lowered as seen by the reduction of malondialdehyde (−14.03% vs 2.76%) and the increase in superoxide dismutase and glutathione (17.38% vs 2.19% and 4.63% vs −2.36%, respectively, p < 0.01). No adverse effects were observed. Kidney, liver, and lipid panels remained unchanged. These results indicated that Sinetrol‐XPur supplementation is a viable option for reducing abdominal fat, waist and hip circumference, and body weight and for improving inflammatory, glycemic, and oxidative status in healthy overweight individuals. Copyright © 2013 John Wiley & Sons, Ltd.