Bioidentical Hormones: What They Are, Why Women Choose Them, and What to Know

Bioidentical hormone therapy is one of the most debated topics in women's health. Here's what it is, how the thinking on hormone therapy has changed since 2002, why many women choose it, and the questions to ask.

MK Wellness InsightsFounded by Danielle Cordova, Cypress, TX

For many women in perimenopause and menopause, hormone therapy is one of the most important and most confusing decisions they face. Much of that confusion traces back to 2002, when a major study frightened millions of women away from hormones. The thinking has changed a lot since then. This guide, part of our Holistic Health, Both Sides series, explains where things stand.

What "Bioidentical" Means

Bioidentical hormones have the same molecular structure as the hormones your body makes, like estradiol (estrogen) and progesterone. They can be:

• FDA-approved bioidentical products, like estradiol patches, gels, and pills, and micronized progesterone capsules, available by prescription at regular pharmacies
• Compounded bioidentical hormones, custom-mixed by a compounding pharmacy for an individual patient, often as creams, capsules, or pellets

This is different from older hormone therapies, like conjugated equine estrogens (made from horse urine) and synthetic progestins, which were used in the 2002 study.

What Changed Since 2002

The Women's Health Initiative (WHI) study, stopped early in 2002, reported increased risks of breast cancer, heart disease, and stroke in women taking hormones. Hormone use dropped dramatically.

Later analyses of the same data painted a more nuanced picture:

• The women in the study were, on average, 63 years old, more than a decade past menopause.
• It used conjugated equine estrogen and a synthetic progestin, not bioidentical hormones.
• For women who start hormone therapy under age 60 or within 10 years of menopause, the benefits often outweigh the risks for relieving symptoms, according to current guidance from The Menopause Society.

Physicians like Dr. Sara Gottfried, Dr. Mary Claire Haver, and others have helped bring this updated view to women, and many of our favorite women's hormone experts discuss it.

Why Women Choose Bioidentical Hormones

• Relief of symptoms: hot flashes, night sweats, sleep problems, vaginal dryness, and mood changes
• Bone protection: estrogen helps protect against bone loss and osteoporosis
• Feeling like themselves again: many women describe better sleep, mood, energy, libido, and quality of life
• A natural match: bioidentical hormones are molecularly identical to the body's own
• Personalization, especially with compounded options

What the Research Shows

• FDA-approved estradiol and micronized progesterone are well studied, and transdermal estrogen (patches and gels) has been associated with a lower risk of blood clots than oral estrogen in observational studies.
• Micronized progesterone has been associated with a more favorable breast and cardiovascular profile than synthetic progestins in observational research.
• Vaginal estrogen in low doses is widely considered safe and effective for vaginal and urinary symptoms.

What to Know Before You Start

• FDA-approved vs. compounded. Compounded hormones aren't FDA-approved, so dose consistency and purity depend on the pharmacy. Many practitioners use compounded hormones when a woman needs something not available in an approved form. Ask where your prescription is made and how it's tested.
• Pellets release hormones over months and can't be removed once placed, which makes dose adjustments harder. Ask about the dose and how levels will be monitored.
• Women with a uterus who take estrogen need progesterone to protect the uterine lining.
• Personal history matters: a history of breast cancer, blood clots, stroke, heart disease, or liver disease changes the conversation.
• Salivary hormone testing is used by some practitioners, though many prefer blood tests and symptoms.
• Find a provider experienced in menopause, like a certified menopause practitioner or an integrative physician, who will monitor you over time.

Supporting the Terrain Alongside Hormones

Whatever you choose, the foundations matter: protein and strength training for muscle and bone, blood sugar stability, sleep, and stress. See menopause is a transition to support. At MK Wellness, red light, infrared sauna, EWOT, EMS for strength, and the NeuroVizr Sound Lounge are popular with women in this season. Explore our Hormonal Balance protocol.

MK Wellness services are non-medical and not intended to diagnose, treat, cure, or prevent any condition. MK Wellness does not prescribe or provide hormone therapy. This article is general education, not medical advice. Discuss hormone therapy with a qualified provider who knows your personal and family history.

The Hormonal Balance Protocol at MK Wellness

We build this goal around modalities that work better together. The core of the protocol:

Know someone who needs this?

Ready to start your protocol?