Article

Consumption of tomato products with olive oil but not sunflower oil increases the antioxidant activity of plasma.

Northern Ireland Centre for Diet and Health, School of Biomedical Sciences, University of Ulster, Northern Ireland, Coleraine, UK.
Free Radical Biology and Medicine (impact factor: 5.42). 11/2000; 29(10):1051-5. pp.1051-5
Source: PubMed

ABSTRACT Health benefits of lycopene from tomato products have been suggested to be related to its antioxidant activity. Dietary fat may influence the absorption and hence the plasma levels and antioxidant activity of lycopene. In the present study, we have compared the effect of consumption of tomato products with extra-virgin olive oil vs. tomato products plus sunflower oil on plasma lycopene and antioxidant levels. Results show that the oil composition does not affect the absorption of lycopene from tomato products because similar levels of plasma lycopene (mean +/- SD) were obtained on feeding tomatoes (providing approximately 46 mg lycopene/d) for 7 d with either olive oil (0.66 +/- 0.26 vs 1.20 +/- 0.20 micromol/l, p <.002) or sunflower oil (0.67 +/- 0.27 vs. 1.14 micromol/l, p <.001). However, consumption of tomato products with olive oil significantly raised the plasma antioxidant activity (FRAP) from 930 +/- 150 to 1118 +/- 184 micromol/l, p <.01) but no effect was observed when the sunflower oil was used. The change (supplementation minus start values) in FRAP following the consumption of tomato products with oil was significantly higher for olive oil (190 +/- 101) than for sunflower oil (-9.6 +/- 99, p <. 005). In conclusion, the results of the study show that consumption of tomato products with olive oil but not with sunflower oil improves the antioxidant activity of the plasma.

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Keywords

46 mg lycopene/d
 
absorption
 
antioxidant activity
 
antioxidant levels
 
Dietary fat
 
extra-virgin olive oil
 
FRAP
 
Health benefits
 
oil composition
 
olive oil
 
plasma
 
plasma antioxidant activity
 
plasma levels
 
plasma lycopene
 
sunflower oil
 
supplementation
 
tomato products
 
tomatoes