Summary Obesity has increased in children and adolescents. What is reflected in the early occurrence of cardiometabolic alterations, like hypertension and type 2 diabetes, where the oxLDL formation is stimulated. Various studies have shown that plasma a-tocopherol (a-TP) can protect LDL against oxidation. Nevertheless, the action of plasma a-TP in cardiovascular diseases remains controversial. We conducted a cross-sectional study to evaluate plasma a-TP and its impact on the concentration of LDL(2). Adolescents (n5150) of both sexes were classified into three groups: healthy weight (HW; 50%), overweight (OV; 22%), and obese (OB; 28%). Lipid profile, LDL(2), anti-oxLDL and anti-LDL(2) antibodies, CRP (ELISA) and plasma a-TP (HPLC) were analyzed. Demographic, anthropometric, and food intake data were evaluated. Crude and energy-adjusted intake of vitamin E in the OB group were higher than in the HW group (p,0.001). Crude and energy-adjusted vitamin E intakes were not correlated with plasma a-TP (r520.07; p50. 412 and r520.064; p50.467, respectively). Subjects in the OB group had higher TC and LDL-C and lower HDL-C than in the HW and OV groups. C-reactive protein and anti-oxLDL antibodies changed as a function of BMI. The impact of obesity was reinforced by high values for LDL(2) and low content of plasma a-TP in comparison with the HW (p,0.001) and OV groups (p50.03). This negative profile was maintained for the ratio between a-TP and TC or LDL-C. Plasma a-TP, a-TP/TC and a-TP/LDL-C were negatively associated with LDL(2) and other cardiometabolic risk factors (BMI, WC, AC and anti-oxLDL). Our results demonstrate that obesity in adolescents is associated with high levels of LDL(2) and low plasma a-TP content.