If you have considered hormone replacement therapy (HRT), you may have encountered some alarming and often contradictory information. Does HRT cause breast cancer? Is HRT safe after menopause? Simple yes-or-no answers rarely tell the whole story.
For Breast Cancer Awareness Month, Genesis Lifestyle Medicine is taking a closer look at HRT and breast cancer. Here, we separate some of the most common myths from the facts so you can better understand the research and have an informed conversation with your healthcare provider.
Fiction: HRT causes breast cancer
Fact: Using HRT does not mean you will develop breast cancer. Your risk depends on several factors, including the hormones used, your age, how long you use HRT, and your individual health history.
Research has found different risk profiles for estrogen-only and combined estrogen-progestogen therapy. Combined therapy has been associated with an increased risk of breast cancer, particularly with longer use. Estrogen-only therapy has not shown the same pattern in women who have had a hysterectomy.
Fiction: The research from 2002 proved HRT is dangerous
Fact: The Women's Health Initiative (WHI) findings published in 2002 significantly changed how HRT was viewed. However, follow-up research has provided important context.
Many women in the original study were older, and risk can differ depending on when HRT is started. Current guidance considers factors such as your age, time since menopause, type of hormones, dose, route of administration, and duration of treatment. For many healthy women younger than 60 or within 10 years of menopause, the benefit-risk profile may be more favorable than when HRT is initiated later.
Fiction: Every type of HRT has the same risks
Fact: HRT is not one treatment. It can involve estrogen alone or estrogen combined with a progestogen and can be delivered through pills, patches, gels, sprays, or other formulations.
Whether you have a uterus also matters. Estrogen-only therapy is generally reserved for women who have undergone a hysterectomy because taking estrogen without adequate uterine protection can increase endometrial cancer risk. Your provider can consider these differences when discussing an appropriate approach for you.
Fiction: The FDA changed its warnings because HRT is completely safe
Fact: Recent FDA labeling changes reflect a more nuanced understanding of HRT, not a conclusion that hormone therapy is risk-free.
The FDA announced changes to broad boxed warnings for menopausal hormone therapy in 2025, with labeling changes for several products subsequently approved. HRT can still carry risks, and whether those risks are acceptable depends on your individual circumstances. Your personal and family history, cardiovascular health, cancer history, symptoms, and treatment goals should all be considered.
Fiction: Your breast cancer history does not matter when considering HRT
Fact: A history of breast cancer can significantly affect the HRT conversation. This is especially important with hormone receptor-positive breast cancer because these cancer cells can respond to estrogen and/or progesterone.
Systemic HRT is generally not recommended for women with a history of breast cancer, particularly hormone receptor-positive disease. If you have had breast cancer, decisions about managing menopausal symptoms should involve your oncology and healthcare teams.
Fiction: HRT is the same as hormone therapy for breast cancer
Fact: The similar names can be confusing, but these therapies essentially have opposite goals.
HRT replaces hormones to help manage menopausal symptoms. Endocrine therapy used for hormone-sensitive breast cancer instead lowers hormone levels or blocks their effects to help prevent cancer cells from responding to those hormones.
Get the facts about HRT
The conversation around HRT has changed considerably over the past two decades. Rather than viewing hormone therapy as universally safe or dangerous, current evidence supports looking carefully at your individual circumstances.
Genesis Lifestyle Medicine takes a personalized approach to hormone therapy, considering your symptoms, health history, and goals. Join us for our upcoming Breast Cancer Awareness Month webinar to learn more about HRT and breast cancer and get the information you need to have a productive conversation with your healthcare provider.
