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Journal of Nutrition Vol. 121 No. 2 February 1991, pp. 165-169
Copyright © 1991 by American Society for Nutrition
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The Effects of Fish Oil on Triglycerides, Cholesterol, Fibrinogen and Malondialdehyde in Humans Supplemented with Vitamin E

Olle Haglund, Riitta Luostarinen, Rolf Wallin, Lars Wibell* and Tom Saldeen

Departments of Forensic Medicine * Internal Medicine, University of Uppsala, Uppsala, Sweden

The effects of fish oils supplemented with 0.3 IU/g and 1.5 IU/g of vitamin E were compared in a double-blind, cross-over study. Twelve healthy volunteers were given 30 mL/day of either oil for 3 wk. Intake of the vitamin E-rich fish oil resulted in a marked decrease in serum triglycerides (48%) and in fibrinogen (11%). After administration of the low vitamin E-containing oil there was a considerably smaller reduction of serum triglycerides and no significant reduction of fibrinogen. Both oils caused an increase in high density lipoprotein cholesterol and a decrease in the atherogenic index, but neither oil altered the total cholesterol level. Serum vitamin E was decreased by 9% and plasma malondialdehyde was increased by 122% after intake of the low vitamin E-containing oil, but both remained normal after intake of the other oil. The effect of vitamin E may be due to inhibition of fatty acid peroxidation with less formation of malondialdehyde and a larger amount of active (n-3) fatty acids in their sites of action in the liver, resulting in a greater decrease in the synthesis of triglycerides and fibrinogen.

KEY WORDS: • (n-3) fatty acids • vitamin E • malondialdehyde • triglycerides • humans

Manuscript received 9 January 1990. Revision accepted 24 August 1990.






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