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  • Title: [The effect of fish oil on metabolic parameters in patients with type 2 diabetes mellitus associated with dyslipidemia].
    Author: Zák A, Zeman M, Tvrzická E, Stolba P.
    Journal: Cas Lek Cesk; 1996 May 29; 135(11):354-9. PubMed ID: 8706072.
    Abstract:
    BACKGROUND: The authors discuss the effect of administration of fish oils rich in n-3 fatty acids in diabetic patients type 2 and draw attention to the possible deterioration of glucose homeostasis. The objective of the investigation was to assess changes of the lipid and carbohydrate metabolism in type 2 diabetics with associated dyslipidaemia after enrichment of the diet with n-3 fatty acids. METHODS AND RESULTS: To 17 patients with type 2 diabetes and dyslipidaemia fish oil containing 5.5 g n-3 fatty acids per day was administered. After six weeks a decline of triglycerides was recorded (-47%, P < 0.01), free fatty acids (-27%, P < 0.01) and a rise of HDL2-cholesterol (25%, P < 0.05). The concentration of apo B, apo A-1, LDL- and HDL cholesterol did not change significantly. There were no significant changes of the blood sugar level, glycosylated haemoglobin and fructosamine. The insulin and C-peptide concentration on fasting (and after glucagon stimulation) did not change significantly. With regard to the HDL2-cholesterol and 18:0 fatty acid concentration in serum the group can be divided into responders (with a decline of glycosylated haemoglobin) and non-responders. The two groups have a reverse trend of blood sugar levels and insulinaemia and differ as to the metabolism of 18:1 n-7 acid. CONCLUSIONS: Enrichment of the diet with n-3 fatty acids in diabetics with dyslipidaemia has a favourable effect on the plasma lipid spectrum without causing deterioration of parameters of diabetes compensation. Among the group of patients some can be found where fish oil administration improves also glucose homeostasis.
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