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- W2057081268 abstract "Oxidative stress, caused by an imbalance between antioxidant capacity and reactive oxygen species, may be an early event in a metabolic cascade elicited by a high glycemic index (GI) diet, ultimately increasing the risk for cardiovascular disease and diabetes. We conducted a feeding study to evaluate the acute effects of low‐GI compared with high‐GI diets on oxidative stress and cardiovascular disease risk factors. The crossover study comprised two 10‐day in‐patient admissions to a clinical research center. For the admissions, 12 overweight or obese (BMI: 27–45 kg/m 2 ) male subjects aged 18–35 years consumed low‐GI or high‐GI diets controlled for potentially confounding nutrients. On day 7, after an overnight fast and then during a 5‐h postprandial period, we assessed total antioxidant capacity (total and perchloric acid (PCA) protein‐precipitated plasma oxygen radical absorbance capacity (ORAC) assay) and oxidative stress status (urinary F 2α ‐isoprostanes (F 2 IP)). On day 10, we measured cardiovascular disease risk factors. Under fasting conditions, total antioxidant capacity was significantly higher during the low‐GI vs. high‐GI diet based on total ORAC (11,736 ± 668 vs. 10,381 ± 612 µmol Trolox equivalents/l, P = 0.002) and PCA‐ORAC (1,276 ± 96 vs. 1,210 ± 96 µmol Trolox equivalents/l, P = 0.02). Area under the postprandial response curve also differed significantly between the two diets for total ORAC and PCA‐ORAC. No diet effects were observed for the other variables. Enhancement in plasma total antioxidant capacity occurs within 1 week on a low‐GI diet, before changes in other risk factors, raising the possibility that this phenomenon may mediate, at least in part, the previously reported effects of GI on health." @default.
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- W2057081268 date "2009-09-01" @default.
- W2057081268 modified "2023-10-18" @default.
- W2057081268 title "Acute Effects of Dietary Glycemic Index on Antioxidant Capacity in a Nutrient-controlled Feeding Study" @default.
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- W2057081268 doi "https://doi.org/10.1038/oby.2009.203" @default.
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