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August 2019

Eur J Epidemiol. 1995 Apr; 11(2): 207-11.

Levels of lipid peroxidation and antioxidants in vegetarians.

Krajcovicová-Kudlácková M, Simoncic R, Babinská K, Béderová A.

Research Institute of Nutrition, Bratislava, Slovakia.

Age dependence of lipid peroxidation levels estimated as conjugated dienes (CD) of plasma fatty acids was investigated in vegetarian and non-vegetarian males and females aged 11-14, 15-18, 19-39 and 40-60 years. The increase of CD levels with age was found in probands on both types of nutrition up to the age of 40 years. In the first three age groups, lipid peroxidation was insignificantly lower in vegetarians when compared to nonvegetarians. The increase of conjugated dienes was on the level of significance (p < 0.05) in the oldest vegetarians vs nonvegetarians. Therefore, content of defense parameters--antioxidative vitamin and enzyme--was estimated in blood of vegetarians aged 40-60 years. Significantly higher levels of vitamin C and catalase activity were found in vegetarians (C-63.6 and 86.5 mumol/l; CAT-1497 and 1313 U/ml for males and females, respectively) when compared to nonvegetarians (C-41.3 and 54.4 mumol/l; CAT-1192 and 1086 U/ml). A significant negative linear correlation (p < 0.001) for CD-C and CD-CAT was found in both sexes of vegetarians and in nonvegetarian females (p < 0.05 for nonvegetarian males). Important finding is a more pronounced in vegetarians (2.5-3.4 times higher slope of regression lines) indicating positive effect of vegetarian nutrition on efficiency of protection system.

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