Journal
MENOPAUSE-THE JOURNAL OF THE NORTH AMERICAN MENOPAUSE SOCIETY
Volume 14, Issue 5, Pages 905-912Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/gme.0b013e318032b2d3
Keywords
soy isoflavones; fasting glucose; lipids; postmenopausal women
Categories
Ask authors/readers for more resources
Objective: Long-term effects of soy-derived isoflavones on lipids remain uncertain, and few data are available on their effects on glycemic control. We examined the effects of isolated soy germ isoflavones on the changes in fasting glucose (FG) and lipids. Design: A double-blind, randomized, placebo-controlled trial was conducted in 203 postmenopausal Chinese women aged 48 to 62 years. They were randomly assigned to receive daily doses of 500 mg calcium, and 0 mg isoflavones (placebo, n = 67), 40 mg isoflavones (n = 68), and 80 mg isoflavones (n = 68). Serum FG, triglycerides, high-density lipoprotein, low-density lipoprotein, total cholesterol, and lipoprotein cholesterol were measured at baseline and I year after treatment. The primary data analysis was performed on the 203 randomized women according to the intent-to-treat principle. The last value carried forward was used for any missing data at follow-up. Results: We observed moderate but significant favorable effects of soy isoflavones on the changes (P = 0.012) and percentage of changes (P = 0.031) in FG (analysis of variance). The 1-year mean (SD) differences of FG changes were -5.2 (-9.4 to -1.0) mg/dL (P = 0.010) and -3.3 (-7.5 to 0.9) mg/dL (P = 0.18) in the 40- and 80-mg isoflavone groups compared with the placebo group. We also noted a significant interaction between the treatment and baseline FG on the changes in FG (P = 0.004). The isoflavone effects were much more significant in women with baseline FG 100 mg/dL or more than in those with FG less than 90 mg/dL. We observed little effect of soy isoflavones on changes in serum lipids among the treatment groups. Conclusions: One-year of soy isoflavone supplementation might have a favorable effect on FG in women, but has no significant effect on serum lipids.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available