Effect of a fish-oil concentrate on serum lipids in postmenopausal women receiving and not receiving hormone replacement therapy in a placebo-controlled, double-blind trial.
BACKGROUND
n-3 Fatty acid supplementation lowered serum triacylglycerol concentrations in studies in which most of the subjects were male. The effects of n-3 fatty acid supplementation in postmenopausal women receiving and not receiving hormone replacement therapy (HRT) have received little attention.


OBJECTIVE
We sought to determine the effects of a fish-oil-derived n-3 fatty acid concentrate on serum lipid and lipoprotein risk factors for cardiovascular disease in postmenopausal women receiving and not receiving HRT, with an emphasis on serum triacylglycerol concentrations and the ratio of triacylglycerol to HDL cholesterol.


METHODS
Postmenopausal women (n = 36) were grouped according to exogenous hormone use and were randomly allocated to receive 8 capsules/d of either placebo oil (control) or n-3 fatty acid-enriched oil (supplement). The supplement provided 2.4 g eicosapentaenoic acid (EPA) plus 1.6 g docosahexaenoic acid (DHA) daily. Serum lipids and the fatty acid composition of serum phospholipids were determined on days 0 and 28.


RESULTS
Supplementation with n-3 fatty acids was associated with 26% lower serum triacylglycerol concentrations (P < 0.0001), a 28% lower overall ratio of serum triacylglycerol to HDL cholesterol (P < 0.01), and markedly greater EPA and DHA concentrations in serum phospholipids (P < 0.05).


CONCLUSIONS
These results show that supplementation with a fish-oil-derived concentrate can favorably influence selected cardiovascular disease risk factors, particularly by achieving marked reductions in serum triacylglycerol concentrations and triacylglycerol:HDL cholesterol in postmenopausal women receiving and not receiving HRT. This approach could potentially reduce the risk of coronary heart disease by 27% in postmenopausal women.
Department of Human Biology and Nutritional Sciences, University of Guelph, Canada.
K D
KD
Stark
E J
EJ
Park
V A
VA
Maines
B J
BJ
Holub
D000328:Adult; D002318:Cardiovascular Diseases / Q000517:prevention & control*; D008076:Cholesterol, HDL / Q000097:blood; D008078:Cholesterol, LDL / Q000097:blood; D019587:Dietary Supplements; D004311:Double-Blind Method; D015525:Fatty Acids, Omega-3 / Q000008:administration & dosage*; D005260:Female; D020249:Hormone Replacement Therapy; D006801:Humans; D008055:Lipids / Q000097:blood*; D008875:Middle Aged; D017698:Postmenopause / Q000097:blood; D014280:Triglycerides / Q000097:blood
D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D015525:Fatty Acids, Omega-3; D008055:Lipids; D014280:Triglycerides