by Jeffrey Dach MD
A 55 year old post menopausal executive secretary had been doing well for many years on her bioidentical hormone program. Last week, she called the office to report her menopausal symptoms had returned. She was again feeling miserable, with recurring hot flashes, night sweats and insomnia. Mysteriously, the bioidentical hormone cream has stopped working. Left image Soy Protein Bars courtesy of Vegan Coach .com
I asked her if she was doing anything differently. She said “No, not really, except for the case of Soy Protein Bars from the discount store.” She had decided to go vegetarian and now consumed three soy bars a day as a protein replacement. Shortly thereafter, the hormone cream stopped working for her.
Apparently, the soy protein bars were acting as an anti-estrogen, blocking the effect of the bioidentical hormone cream. Once she stopped the soy protein bars, the bioidentical hormone cream worked again. Her insomnia, hot flashes and night sweats were gone……
Soy Derived Isoflavones Are Anti-Estrogenic Endocrine Disrupters
Dr Mueller reported in 2004, ” Due to their anti-estrogenic potencies, the soy-derived isoflavones, coumestrol, resveratrol, and zearalenone would appear to have the potential for effectively functioning as endocrine disruptors.” (1)
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Jeffrey Dach MD
7450 Griffin Road Suite 190
Davie, Fl 33314
References 1) Toxicol Sci. 2004 Jul;80(1):14-25. Epub 2004 Apr 14.
Phytoestrogens and their human metabolites show distinct agonistic and antagonistic properties on estrogen receptor alpha (ERalpha) and ERbeta in human cells. Mueller SO1, Simon S, Chae K, Metzler M, Korach KS.
Author information 1Molecular Toxicology, Institute of Toxicology, Merck KGaA, Darmstadt, Germany.
Due to their abundance and (anti)-estrogenic potencies, the soy-derived isoflavones, coumestrol, resveratrol, and zearalenone would appear to have the potential for effectively functioning as endocrine disruptors.
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