NDLI: Higher bioavailability of isoflavones after a single ingestion of aglycone-rich fermented soybeans compared with glucoside-rich non-fermented soybeans in Japanese postmenopausal women.

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Higher bioavailability of isoflavones after a single ingestion of aglycone-rich fermented soybeans compared with glucoside-rich non-fermented soybeans in Japanese postmenopausal women.

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Higher bioavailability of isoflavones after a single ingestion of aglycone-rich fermented soybeans compared with glucoside-rich non-fermented soybeans in Japanese postmenopausal women.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Okabe, Yuki Shimazu, Tsukasa Tanimoto, Hiroyuki
Spatial Coverage	Japan
Description	Country affiliation: Japan Author Affiliation: Okabe Y ( Research Institute for Health Fundamentals, Ajinomoto Co., Inc., 1-1, Suzuki-cho, Kawasaki 210-8681, Japan. yuki_okabe@ajinomoto.com)
Abstract	BACKGROUND: There have been conflicting study results concerning how the food matrix affects the bioavailability of isoflavone aglycone and glucoside. In this study the bioavailability of isoflavones after a single ingestion of aglycone-rich fermented soybeans (Fsoy) and glucoside-rich non-fermented soybeans (Soy) was compared. Eleven healthy postmenopausal Japanese women were recruited for a randomised, double-blind, crossover trial and consumed Fsoy or Soy powder dissolved in hot water. Blood samples were collected 0, 1, 2, 3, 4, 6, 8, 12 and 24 h and urine samples from 0 to 48 h after ingestion of the powders. The Fsoy and Soy powders ingested had the same total isoflavone content (95 µmol), but the former was rich in aglycone (90.6 µmol) while the latter was rich in glucoside (81.9 µmol). RESULTS: Serum concentrations of total isoflavones after 1-4 h were significantly higher in the Fsoy group than in the Soy group. The Fsoy group showed significantly higher maximum concentration (Cmax: 2.79 ± 0.13 vs 1.74 ± 0.13 µmol L(-1) ) and area under the curve (AUC(0-24 h) : 23.78 ± 2.41 vs 19.95 ± 2.03 µmol day L(-1) ) and lower maximum concentration time (Tmax: 1.00 ± 0.00 vs 5.00 ± 0.67 h) compared with the Soy group. The cumulative urinary excretion of total isoflavones after 2 h was significantly higher in the Fsoy group than in the Soy group. Individual isoflavones (daidzein, genistein and glycitein) showed similar trends to total isoflavones. Equol (a metabolite from daidzein) did not differ between the two groups. CONCLUSION: The results of this study demonstrated that the isoflavones of aglycone-rich Fsoy were absorbed faster and in greater amounts than those of glucoside-rich Soy in postmenopausal Japanese women.
File Format	HTM / HTML
ISSN	00225142
Issue Number	4
Volume Number	91
e-ISSN	10970010
Journal	Journal of the Science of Food and Agriculture
Language	English
Publisher	Wiley
Publisher Date	2011-03-15
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Agriculture Glucosides Pharmacokinetics Isoflavones Plant Extracts Seeds Chemistry Soybeans Aged Area Under Curve Biological Availability Cross-over Studies Double-blind Method Female Fermentation Blood Urine Humans Japan Middle Aged Postmenopause Microbiology Comparative Study Journal Article Randomized Controlled Trial
Content Type	Text
Resource Type	Article
Subject	Nutrition and Dietetics Food Science Biotechnology Agronomy and Crop Science

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Higher bioavailability of isoflavones after a single ingestion of aglycone-rich fermented soybeans compared with glucoside-rich non-fermented soybeans in Japanese postmenopausal women.