I've been on 450mgs of pure EPA twice a day since the 9nth of this month making it 2 weeks and a day since i started. My subjective experience with EPA is quite positive so far and I will continue using it for some time to see how it evens out overall.
#1
1: Am J Clin Nutr. 2008 May;87(5):1156-62.
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Plasma eicosapentaenoic acid is inversely associated with severity of depressive symptomatology in the elderly: data from the Bordeaux sample of the Three-City Study.
Féart C, Peuchant E, Letenneur L, Samieri C, Montagnier D, Fourrier-Reglat A, Barberger-Gateau P.
INSERM U593, Equipe Epidémiologie de la Nutrition et des Comportements Alimentaires, Bordeaux, France. catherine.feart@isped.u-bordeaux2.fr
BACKGROUND: Depressive symptoms are commonly observed in elderly people, and nutritional factors such as polyunsaturated fatty acids (PUFAs) have been proposed as potential protective determinants of depressive disorders. OBJECTIVE: The objective was to analyze the relation between plasma fatty acids and severity of depressive symptomatology (DS) in French elderly community dwellers. DESIGN: The study population (mean age: 74.6 y) consisted of 1390 subjects from Bordeaux (France) included in the Three-City Study cohort. DS was evaluated by using the Center for Epidemiologic Studies Depression scale. The use of antidepressant drugs was recorded. The proportion of each plasma fatty acid was determined. Cross-sectional analysis of the association between plasma fatty acids and severity of DS was performed by multilinear regression. RESULTS: Compared with control subjects, subjects with DS were older, were more often women, were more often widowed or single, were of lower income, were receiving antidepressant treatment more frequently, had a lower incidence of hypercholesterolemia, and had lower Mini-Mental State Examination scores (mean: -1.1 point; P < 0.0001). Plasma eicosapentaenoic acid (EPA) was lower in the subjects with DS than in the control subjects (0.85% compared with 1.01%; P = 0.001). There were no significant differences in any other fatty acid. When adjusted for potential confounders, such as sociodemographic characteristics and health indicators, plasma EPA was inversely associated with the severity of DS (beta = -0.170, P = 0.040) in subjects taking antidepressants. CONCLUSION: Higher plasma EPA was associated with a lower severity of DS in elderly subjects, especially those taking antidepressants.
Publication Types:
* Research Support, Non-U.S. Gov't
PMID: 18469234 [PubMed - in process]
Heres a study on mice showing EPA supplementation increases DHA concentration in mice equal to taking DHA itself.
#2
1: Nutrition. 2008 Mar;24(3):245-54.
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Dietary eicosapentaenoic acid and docosahexaenoic acid equally incorporate as decosahexaenoic acid but differ in inflammatory effects.
Sierra S, Lara-Villoslada F, Comalada M, Olivares M, Xaus J.
Biomedicine Department, Puleva Biotech SA, Granada, Spain. molivares@puleva.es
OBJECTIVE: The omega-3 polyunsaturated fatty acids are involved in the modulation of the immune response. Docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) produced from dietary precursors may not be sufficient to match nutritional requirements and thus should be included in our diet. In this sense, the administration of higher amounts of DHA than of EPA in infant formulations is recommended. The aims of this work were to demonstrate that dietary administration of EPA or DHA to mice allows reaching similar tissue DHA levels and to compare their anti-inflammatory effects and mechanisms of action. METHODS: Balb/c mice were fed diets enriched with EPA or DHA for 3 wk. Twelve hours before sacrifice, a contact dermatitis was induced in the ears of the animals. Tissue fatty acid contents were determined. Cytokine and immunoglobulin concentrations were measured by enzyme-linked immunosorbent assay, and ears were collected to analyze local inflammatory effects. RESULTS: The DHA concentrations attained in tissues were similar to the two diets, whereas the EPA concentration increased only when the diet was enriched with this polyunsaturated fatty acid. Although EPA and DHA reduced ear inflammation, EPA reduced neutrophil infiltration in the ears more efficiently. EPA was associated with a greater reduction in the systemic macrophage inflammatory response and T-helper type 2 response and with increased interleukin-10 production. CONCLUSION: Similar levels of DHA in tissues are reached in mice fed an EPA- or a DHA-enriched diet. Dietary EPA and DHA show anti-inflammatory properties, but EPA appears to be more potent.