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Food matrix and isoflavones bioavailability in early post menopausal women: A European clinical study

Author: Chanteranne, B. · Branca, F. · Kardinaal, A. · Wahala, K. · Braesco, V. · Ladroite, P. · Brouns, F. · Coxam, V.
Type:article
Date:2008
Institution: TNO Kwaliteit van Leven
Source:Clinical Interventions in Aging, 4, 3, 711-718
Identifier: 241270
Keywords: Nutrition · Physiological Sciences · Bioavailability · Equol · Food processing · Postmenopausal women · Soy isoflavones · Aglycone · Daidzein · Equol · Flavone · Genistin · Isoflavone · Oxygen desmethyl angolensin · Unclassified drug · Adult · Article · Bioavailability · Blood level · Cereal · Clinical trial · Controlled clinical trial · Controlled study · Female · Food composition · Food intake · Human · Multicenter study · Normal human · Postmenopause osteoporosis · Randomized controlled trial · Soybean · Urine level · Biological Availability · Bone and Bones · Cross-Over Studies · Female · Food, Fortified · Humans · Isoflavones · Middle Aged · Patient Compliance · Phytoestrogens · Postmenopause · Soy Foods · Healthy for Life · Healthy Living

Abstract

The estrogenic effects of soy isoflavones (IF) on symptoms of menopause are of particular interest. The aim of the present study was to improve compliance of IF in two IF-enriched foods providing the same IF circulating levels in postmenopausal women. Forty-two healthy postmenopausal women (mean age: 53.28 years) were recruited for a randomized, crossover, multicenter trial conducted in the Netherlands, Italy and France. Over 18 days, volunteers were assigned to two groups and supplemented with two different IF-enriched foods (100 mg IF aglycones/two servings). The first group had to eat two biscuits daily for three days. After a wash-out period (11 d), they received cereal bars for three days. The second group started with the cereal bars and finished with biscuits. After IF intake, plasma and urinary levels of genistein, daidzein, O desmethyl angolensin and equol significantly increased and returned to baseline level after the washout period. There was no difference between biscuits and cereals bars intake, as shown by group values at each end of experimental period (day 4 or day 18). Both matrixes are comparable in terms of IF-circulating levels and could be used independently. © 2008 Chanteranne et al, publisher and licensee Dove Medical Press Ltd.