Cited by 416Phytoestrogen effects and researchGut microbiota and healthPhytochemicals and Antioxidant Activities

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Equol: A Bacterial Metabolite from The Daidzein Isoflavone and Its Presumed Beneficial Health Effects

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Mayo, Baltasar, Vázquez, Lucía, Flórez, Ana Belén·2019·Nutrients

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Abstract

Epidemiological data suggest that regular intake of isoflavones from soy reduces the incidence of estrogen-dependent and aging-associated disorders, such as menopause symptoms in women, osteoporosis, cardiovascular diseases and cancer. Equol, produced from daidzein, is the isoflavone-derived metabolite with the greatest estrogenic and antioxidant activity. Consequently, equol has been endorsed as having many beneficial effects on human health. The conversion of daidzein into equol takes place in the intestine via the action of reductase enzymes belonging to incompletely characterized members of the gut microbiota. While all animal species analyzed so far produce equol, only between one third and one half of human subjects (depending on the community) are able to do so, ostensibly those that harbor equol-producing microbes. Conceivably, these subjects might be the only ones who can fully benefit from soy or isoflavone consumption. This review summarizes current knowledge on the microorganisms involved in, the genetic background to, and the biochemical pathways of, equol biosynthesis. It also outlines the results of recent clinical trials and meta-analyses on the effects of equol on different areas of human health and discusses briefly its presumptive mode of action.

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Authors: Mayo, B., Vázquez, L., & Flórez, A. B.
Affiliations: Consejo Superior de Investigaciones Científicas (ES)
Corresponding author: Mayo, Baltasar
ORCID: Mayo, Baltasar
Vázquez, Lucía
Flórez, Ana Belén
Venue: Nutrients
Publisher: MDPI AG
Published: 2019-09-16
Volume: 11
Issue: 9
Pages: 2231
ISSN: 2072-6643 (ISSN-L)
DOI: 10.3390/nu11092231
PMC: PMC6770660
OpenAlex: W2972497746
Cited by: 416
References: 192
Citations by year: 2026: 56 · 2025: 55 · 2024: 71 · 2023: 75 · 2022: 74 · 2021: 50 · 2020: 33 · 2019: 1
FWCI: 5.88
Type: journal article
Language: en
Open access: gold
dx.doi.org
Licence: cc-by
creativecommons.org/licenses/by/4.0/ (vor)
Locations: Nutrients (publishedVersion, cc-by)
Europe PMC (PubMed Central) (publishedVersion, cc-by)
PubMed Central (publishedVersion, cc-by)
PubMed (publishedVersion)
DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, cc-by)
DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders: Ministerio de Economía, Industria y Competitividad, Gobierno de España (AGL2011-24300-ALI and AGL-2014-57820-R)
Gobierno del Principado de Asturias (GRUPIN14-137 and IDI/2018/000114)
Topics: Health Sciences › Nursing › Nutrition and Dietetics › Phytoestrogen effects and research
Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Health Sciences › Medicine › Biochemistry (medical) › Phytochemicals and Antioxidant Activities
Keywords: equol, daidzein, isoflavones, soybean, gut microbiota, estrogenic activity, antioxidant activity, menopausal symptoms, osteoporosis, cardiovascular disease, cancer prevention
MeSH terms: Gastrointestinal Microbiome, Animals, Bacteria, Diet, Health Status, Humans, Isoflavones, Equol

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Equol: A Bacterial Metabolite from The Daidzein Isoflavone and Its Presumed Beneficial Health Effects

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