Subgram daily supplementation with docosahexaenoic acid protects low-density lipoproteins from oxidation in healthy men.

Abstract : OBJECTIVE: To determine the effect of supplementation with increasing doses of docosahexaenoic acid (DHA), as the only n-3 polyunsaturated fatty acid (PUFA), on low-density lipoprotein (LDL) redox status and oxidizability. METHODS: Twelve healthy men aged 53-65 years ingested consecutive doses of DHA (200, 400, 800 and 1600 mg/day), each dose for two weeks. RESULTS: The proportions of DHA increased dose-dependently in LDL phospholipids and cholesteryl esters, even after two weeks of supplementation with 200mg/day DHA. The daily intake of 200, 400 and 800 mg DHA resulted in increased alpha-tocopherol concentrations, decreased MDA concentrations, and a longer lag time for copper-induced LDL oxidation. Supplementation with 1600 mg/day DHA had no effect on the above parameters. In plasma, concentrations of 4-hydroxy-hexenal, specifically derived from the peroxidation of n-3 fatty acids, significantly increased after 800 and 1600 mg DHA, representing 0.01% of plasma n-3 PUFAs, while 4-hydroxy-nonenal concentrations, derived from the peroxidation of n-6 fatty acids, did not change. CONCLUSION: Our results clearly show that an intake of 200-800 mg/day DHA may have protective and antioxidant effects on LDL and could represent optimal doses for cardiovascular disease prevention in a healthy population.
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Atherosclerosis, Elsevier, 2010, 208 (2), pp.467-72. 〈10.1016/j.atherosclerosis.2009.07.049〉
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Catherine Calzada, Romain Colas, Nicolas Guillot, Michel Guichardant, Martine Laville, et al.. Subgram daily supplementation with docosahexaenoic acid protects low-density lipoproteins from oxidation in healthy men.. Atherosclerosis, Elsevier, 2010, 208 (2), pp.467-72. 〈10.1016/j.atherosclerosis.2009.07.049〉. 〈inserm-00416728〉

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