Journal List > Korean J Nutr > v.43(2) > 1043807

Gwak, Kim, Kim, Shin, and Lee: The Effect of Isoflavone and Gamma-linolenic Acid Supplementation on Serum Lipids and Menopausal Symptoms in Postmenopausal Women

Abstract

This study was performed to examine the combined effects of gamma linolenic acid and isoflavone supplementation on menopausal symptoms and serum lipids in 73 postmenopausal women. A total subjects were randomly assigned to isoflavone (30 mg) + gamma-linolenic acid (110 mg) group or placebo group. We measured menopausal symptoms by modified Kupperman Index (KI) and oxidized LDL, lipid peroxides, blood components and anthropometric parameters before and after the 12 week intervention period. After the 12 weeks of supplementation, supplement group and placebo group showed a significant reduction of modified kupperman index (p < 0.001). Isoflavone (30 mg) + gamma-linolenic acid (110 mg) supplement group showed a significant reduction of oxidized LDL cholesterol concentration (p = 0.006) whereas placebo group did not show significant change. Isoflavone and gamma-linolenic acid consumption did not significantly affect plasma concentrations of total, LDL, HDL cholesterol, triglyceride, apo A1, B and blood components. The result of present study demonstrated the supplementation of 30 mg isoflavone and 110 mg gamma-linolenic acid per day for 12 weeks may protect LDL cholesterol from oxidative stress.

Figures and Tables

Table 1
Anthropometic parameters and blood pressure in postmenopausal women before and after intervention
kjn-43-123-i001

1) Body mass index, 2) Waist to hip ratio, 3) Lean body mass

No significant differences in 0 week value between placebo and supplement group

*: p < 0.05, **: p < 0.01, ***: p < 0.001. Compared with initial value in each group (paired t-test). Mean ± S.E.

Table 2
Oxidized LDL, Lipid peroxides in postmenopausal women before and after intervention
kjn-43-123-i002

1) Tested by log transformed, 2) Malondialdehyde

*: p < 0.05, **: p < 0.01, ***: p < 0.001. Compared with initial value in each group (paired t-test). Mean ± S.E.

Table 3
Lipid profiles in postmenopausal women before and after intervention
kjn-43-123-i003

1) Atherogenic index = (Total cholesterol-HDL cholesterol)/HDL cholesterol, 2) Tested by log transformed

*: p < 0.05, **: p < 0.01, ***: p < 0.001. Compared with initial value in each group (paired t-test). Mean ± S.E.

Table 4
Modified Kupperman index and hormone in postmenopausal women before and after intervention
kjn-43-123-i004

1) Modified kupperman index, 2) Follicle-stimulating hormone, 3) Tested by log transformed

*: p < 0.05, **: p < 0.01, ***: p < 0.001. Compared with initial value in each group (paired t-test). Mean ± S.E.

Table 5
Daily food intake and total energy expenditure in postmenopausal women before and after intervention
kjn-43-123-i005

1) Total energy expenditure

*: p < 0.05, **: p < 0.01, ***: p < 0.001. Compared with initial value in each group (paired t-test). Mean ± S.E.

Notes

This study was supported by a grants of the Korea Healthcare technology R&D Project, Ministry for Health, Welfare & Family Affairs, (A050376) and National Research Laboratory Project no, ROA-2005-000-101440-0, Ministry of Science and Technology Republic of Korea.

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