Understanding the Role of Estrogen in Breast Cancer Risk and Prevention


  • Breast cancer is a common cancer in women, with the highest risks for women between the ages of 25 and 65.
  • The focus in oncology is often on treatment after the disease has occurred, rather than on prevention and risk reduction.
  • The author has found that breast cancer occurrence could be significantly reduced if women knew how to prevent it.

Diagnosis and Assessment

  • There are several diagnostic tools used to assess relative breast cancer risks, including genetic testing, breast imaging screenings, and assessment of environmental toxin exposure, hormonal use, and various personal factors.
  • Early detection through screenings is important, but it is also important to consider the risks of radiation exposure through frequent mammography.

Estrogen and Breast Cancer

  • Most breast cancers in the US are estrogen-receptor positive, meaning they are fueled by excess estrogen.
  • Estrogen is important for various aspects of women's health, including reproductive and sexual maturation, brain and heart health, and bone health.
  • However, excessive estrogen levels can increase the risk of cancer, as well as other conditions such as insulin resistance, diabetes, and obesity.

Sources of Estrogen

  • The body has over 100 different estrogen molecules, with the most common being estrone, estradiol, and estriol.
  • Estrogen is produced by the ovaries, uterus, and adrenal glands.
  • Estrogen dominance, or excessively high estrogen levels, can be caused by various factors including hormonal imbalances, environmental toxins, and certain medications.

Preventing Estrogen Dominance and Reducing Breast Cancer Risks

  • There are several steps that can be taken to prevent estrogen dominance and reduce the risk of breast cancer, including:
  • Balancing hormones through diet, supplements, and lifestyle changes.
  • Reducing exposure to environmental toxins.
  • Supporting liver function to improve estrogen metabolism.
  • Incorporating natural estrogens and hormone balancing herbs into the diet.
  • Using natural progesterone to balance estrogen levels.
  • Reducing stress and maintaining a healthy weight.

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