Obesity is an independent risk factor and a major contributor to morbidity and mortality in the general population( Reference Whitlock, Lewington and Sherliker 1 ). The condition is associated with alterations in both lipid metabolism and adipose tissue distribution( Reference Kissebah, Vydelingum and Murray 2 ), which may affect plasma concentrations of the fat soluble vitamin E. Vitamin E, found in the diet in the form of four tocopherols (α-, β-, γ- and δ-) four tocotrienols (α-, β-, γ- and δ-), is an important antioxidant. Previous studies investigating the relationship between α-tocopherol, and % body fat have shown conflicting results, one study finding a positive correlation( Reference Grolier, Boirie and Levadoux 3 ) and the other no significant correlation( Reference Wallstrom, Wirfalt and Lahmann 4 ). The aim of this study was to determine whether plasma α- and γ-tocopherol concentrations were associated with measures of adiposity in apparently healthy females between 18 and 40 years of age.
A total of 32 normal weight (BMI 18.5–24.9 kg/m2) and 22 overweight/obese (BMI 25–39 kg/m2) volunteers participated in the study. Plasma α- and γ-tocopherol were measured by HPLC (Waters Ltd, Dublin, Ireland). Serum lipids were measured using standard commercial kits. Body composition was analysed using BodPod® by air displacement plethysmography.
ψResults expressed as medians and IQR.
Mean values were significantly different from those of normal weight.
* P=0.001; **P=0.001 from independent samples T-tests.
There were no significant differences in plasma α- and γ-tocopherol and lipid concentrations between the normal weight and the overweight obese groups. No significant correlations were found between plasma tocopherol status and measures of adiposity. In conclusion, vitamin E status does not appear to be affected by increased adiposity in females with a BMI of 25–39 kg/m2 compared to normal weight females. Due to a limited sample size, further research is warranted to investigate if obesity affects vitamin E status.