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Soya–a dietary source of the non-steroidal oestrogen equol in man and animals
Abstract
The dietary origin of the weak oestrogen equol (7-hydroxy-3-(4′-hydroxyphenyl)-chroman) present in human urine has been investigated using gas chromatography–mass spectrometry. Feeding experiments with different food constituents and monitoring the urinary excretion of equol revealed that soya food yields more than 0·1 mg urinary equol/g flour ingested. From this source the glucoside of daidzein (4′,7-dihydroxyisoflavone) has been isolated and identified as a precursor of equol. Both equol and daidzein were characterized as monoglucuronide conjugates in human urine and the concentration of urinary equol exceeded the concentrations of the classical oestrogens by 100- to 1000-fold after ingestion of a single meal containing soya protein. The potential biological significance of this result is discussed. J. Endocr. (1984) 102, 49–56
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Cited by
Setchell, K. D. R., Brown, N. M., & Lydeking-Olsen, E. (2002) · The Journal of Nutrition · doi:10.1093/jn/132.12.3577 · Cited by 1,209
Self-citationThe pros and cons of phytoestrogens
Patisaul, H. B., & Jefferson, W. (2010) · Frontiers in Neuroendocrinology · doi:10.1016/j.yfrne.2010.03.003 · Cited by 746
Adlercreutz, H., Höckerstedt, K., Bannwart, C., Bloigu, S., Hämäläinen, E., Fotsis, T., & Ollus, A. (1987) · Journal of Steroid Biochemistry · doi:10.1016/0022-4731(87)90200-7 · Cited by 503
Watanabe, S., Yamaguchi, M., Sobue, T., Takahashi, T., Miura, T., Arai, Y., Mazur, W., Wähälä, K., & Adlercreutz, H. (1998) · The Journal of Nutrition · doi:10.1093/jn/128.10.1710 · Cited by 423
Mass Balance Study of Isoflavones during Soybean Processing
Wang, H.-J., & Murphy, P. A. (1996) · Journal of Agricultural and Food Chemistry · doi:10.1021/jf950535p · Cited by 386
Metadata
- Authors
- Axelson, M., Sjövall, J., Gustafsson, B. E., & Setchell, K. D. R.
- Venue
- Journal of Endocrinology
- Publisher
- Bioscientifica
- Published
- 1984-07
- Volume
- 102
- Issue
- 1
- Pages
- 49-56
- ISSN
- 0022-0795 (ISSN-L)
- 1479-6805
- OpenAlex
- W1964016705
- Cited by
- 307
- References
- 0
- FWCI
- 3.73
- Type
- journal article
- Language
- en
- Open access
- closed
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- Axelson, M., Sjövall, J., Gustafsson, B. E., & Setchell, K. D. R. (1984). Soya–a dietary source of the non-steroidal oestrogen equol in man and animals. Journal of Endocrinology. https://doi.org/10.1677/joe.0.1020049
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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