The association between diet quality indices and oxidative stress biomarkers in male footballers and healthy active controls

Abstract

Objective The aim of the present study was the association between the relationship between Dietary Quality Index-International (DQI-I) and Healthy Eating Index (HEI) and the urinary levels of F-2alpha-isoprostane (F-2a-IP) and 8-hydroxy-2'-deoxyguanosine (8-OHdG) was investigated as indicators of oxidative stress. Results Based on HEI (low, moderate, and good), the diet quality of both groups was classified as moderate. In all participants, HEI (beta=-0.29; P = 0.04) and DQI-I (beta=-0.46; P = 0.005) were inversely associated with 8-OHdG. Furthermore, a negative correlation was found between HEI (mean beta=-3.53; P = 0.04) and DQI-I (mean beta=-5.53; P = 0.004) with F-2a-IP. The quality of the footballers' diet was higher than that of the control group. Following a high-quality diet, which is rich in antioxidants, is likely to effectively reduce oxidative stress.