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Related Experiment Videos

Phytoestrogens after breast cancer.

P This1, A De La Rochefordière, K Clough

  • 1Service de Chirurgie à orientation Sénologique, Institut Curie, Paris, France. pthis@ch-versailles.fr

Endocrine-Related Cancer
|June 9, 2001
PubMed
Summary

Soy phytoestrogens are promoted as a natural alternative for hormone replacement therapy (HRT) in breast cancer survivors experiencing estrogen deprivation. However, their safety and efficacy lack controlled trials, necessitating a cautious approach.

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Area of Science:

  • Oncology
  • Endocrinology
  • Nutritional Science

Background:

  • Breast cancer survivors often face estrogen deprivation due to adjuvant chemotherapy.
  • Hormone replacement therapy (HRT) is generally avoided in breast cancer survivors due to concerns about estrogen's role in cancer growth.
  • Soy phytoestrogens are marketed as a natural alternative to HRT for managing menopausal symptoms.

Purpose of the Study:

  • To review the complex mammary effects of soy phytoestrogens.
  • To analyze the potential benefits and risks of phytoestrogens in postmenopausal women, particularly after breast cancer.
  • To discuss the implications of phytoestrogen use, including co-prescription with tamoxifen.

Main Methods:

  • Review of epidemiological studies on phytoestrogen effects.

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  • Analysis of in vitro studies on phytoestrogens.
  • Examination of in vivo animal carcinogenesis studies related to phytoestrogens.

    • Main Results:

    • Data on phytoestrogens' mammary effects from various study types are complex.
    • Potential benefits and risks require careful consideration in the context of breast cancer survivorship.
    • Lack of controlled trials and quality control for commercially available phytoestrogen supplements presents a public health concern.

    Conclusions:

    • Physicians should adopt a cautious approach when considering phytoestrogen prescriptions for breast cancer survivors.
    • Clear and accurate information should be provided to women, especially breast cancer survivors, regarding phytoestrogen use.
    • The absence of rigorous clinical validation for 'free sale' phytoestrogen preparations warrants further investigation and physician vigilance.