期刊
JOURNAL OF FOOD SCIENCE
卷 86, 期 4, 页码 1393-1399出版社
WILEY
DOI: 10.1111/1750-3841.15672
关键词
formononetin (blood glucose level); red clover
资金
- Gifu Research& Development Foundation
The study suggests that daily intake of red clover can reduce blood glucose, especially for individuals aged 50 and under. Formononetin, an alpha-glucosidase inhibitor, is considered to be the major functional molecule for these effects.
High blood glucose is associated with increased risk of various diseases. Red clover (RC; Trifolium pratense L.) is an edible legume whose sprout is rich in isoflavones such as formononetin and biochanin A. We examined the effects of RC extract on postprandial and fasting blood glucose level, using a randomized, double-blind, placebo-controlled trial with 36 participants, aged 25 to 64 years, who were randomly assigned to receive either 1.91 g of RC extract (containing 8 mg formononetin and 1.8 mg biochanin A) or placebo. Each participant ingested the assigned test food daily for 8 weeks, and at the oral maltose tolerance test (OMTT). Initially, the two groups did not significantly differ in OMTT results. However, fasting insulin levels at 8 weeks were significantly lower in the RC group (4.76 mu IU/ml at Week 0 to 4.01 mu IU/ml at Week 8) with a significant interaction (P = 0.046). Subgroup analysis showed that change in blood glucose level (blood glucose Delta C) tended to decrease late in the trial period during OMTT in the <= 50-year-old RC group, as did fasting blood glucose and insulin levels at 8 weeks; hemoglobin A1c was also significantly reduced in this subgroup (5.36% at Week 0 to 5.28% at Week 8) with a significant interaction (P = 0.040). These results suggest that the daily intake of RC could reduce blood glucose, particularly for those <= 50 years old. Formononetin-an alpha-glucosidase inhibitor-is considered to be the major functional molecule for these effects. Therefore, intake of RC that contains formononetin might help blood glucose control.
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