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Dietary supplementation of omega-3 (n-3) is becoming increasingly popular as a complementary treatment of chronic inflammatory pain diseases. The aim of the present study was to examine the effects of short-term (35 days) n-3 supplementation on physiological/psychophysical variables and clinical symptoms in patients with musculoskeletal pain and fibromyalgia.  Patients (N=41, all women), blindly assigned to two groups according to dietary supplementation (fish oil containing n-3 or sunflower oil), underwent quantitative sensory testing and completed questionnaires concerning anamnestic/epidemiological data, pain characteristics and mood.  In the n-3 group there was a sharp reduction in both the arachidonic acid/eicosapentaenoic acid ratio (AA/EPA) and the number of positive tender points, but no changes occurred in superficial thermal (heat and cold) and mechanical thresholds (von Frey hairs). There were no modifications in the sunflower oil group. The supplement had no effect on blood lipids and questionnaires indicated no effect on mood, sleep problems and other pain indicators.  The present results encourage clinical trials in larger samples to compare the effects of different daily amounts and treatment durations of n-3 supplementation.

Administration of Omega-3 Fatty Acids Reduces Positive Tender Point Count in Chronic Musculoskeletal Pain Patients