Hormone replacement therapy replaces or supplements hormones that decline during menopause, perimenopause, or other hormonal shifts. It is most commonly used to relieve symptoms including hot flashes, night sweats, vaginal dryness, and sleep disruption. It may also help with mood, bone density, and sexual function depending on the individual and the specific hormones used.

HRT safety depends on the type of hormones used, the delivery method, the dose, the patient's age, and their individual health history. The risks and benefits are well-studied and the research has evolved significantly since the Women's Health Initiative in 2002. Current guidance from major menopause organizations supports the use of HRT for appropriate candidates, particularly women under 60 or within 10 years of menopause onset. A licensed clinician who specializes in hormone health is the right person to evaluate your specific situation.

What is the difference between bioidentical and conventional HRT?

Bioidentical hormones are chemically identical to those your body produces. Conventional HRT may use synthetic hormones that are similar but not identical. FDA-approved bioidentical options exist (like estradiol and micronized progesterone). Compounded bioidentical hormones are not FDA-approved in the same way and lack standardized dosing. The evidence comparing bioidentical to conventional options is not settled. Discuss both with a knowledgeable clinician.

Educational Guide · Hormone Health

HRT Explained

By the UnitedWellness editorial team · 7 min read

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Medical note: This article is for educational purposes only and does not constitute medical advice. Hormone replacement therapy requires evaluation and prescription by a licensed healthcare provider. Individual results vary.

Hormone replacement therapy has been one of the most debated treatments in women’s health for the past two decades. The discussion got complicated after a major study in 2002 raised concerns about risks, then more complicated again as researchers unpacked those findings and the picture became more nuanced. The result is that a lot of people have outdated information about what HRT is, who it’s for, and whether it’s safe.

This guide covers the basics without the hype in either direction.

What is HRT?

Hormone replacement therapy refers to treatments that replace or supplement hormones that decline during menopause, perimenopause, or other hormonal shifts. For women, this most commonly means estrogen, progesterone, or a combination. Some women also receive testosterone as part of a broader hormone optimization approach.

HRT is most widely prescribed to manage the symptoms of menopause and perimenopause: hot flashes, night sweats, vaginal dryness, sleep disruption, mood changes, and brain fog. Beyond symptom relief, evidence supports HRT’s role in maintaining bone density and cardiovascular health in appropriate patients initiated early in the menopause transition.

Who is HRT typically for?

HRT is most commonly prescribed for women in perimenopause or early postmenopause who are experiencing symptoms that affect their quality of life. Current guidance from major menopause organizations - including the Menopause Society - supports the use of HRT for appropriate candidates, particularly women under 60 or within 10 years of menopause onset and without contraindications.

HRT is not appropriate for everyone. Women with a history of certain hormone-sensitive cancers, blood clots, stroke, or other conditions may be advised against it. This is exactly why a licensed clinician who specializes in menopause and hormone health should evaluate your individual situation rather than making a decision based on general guidance alone.

Types of HRT

Estrogen-only HRT is prescribed for women who have had a hysterectomy and no longer have a uterus. Estrogen without progesterone is not appropriate for women with an intact uterus because it increases the risk of uterine cancer.

Combined HRT (estrogen plus progesterone or progestogen) is the standard for women with an intact uterus. The progesterone component protects the uterine lining.

Testosterone is sometimes added, particularly for women who continue to experience low libido or fatigue despite adequate estrogen and progesterone levels.

How HRT is delivered

HRT is available in several forms, each with different absorption profiles and risk considerations:

Patches - applied to skin, deliver a consistent dose, bypass the liver (lower clot risk than oral options)
Gels and creams - applied daily to skin, similar liver bypass benefit
Oral tablets - convenient but metabolized through the liver, associated with slightly higher clot risk than transdermal options
Vaginal estrogen - local treatment for vaginal dryness and urinary symptoms, minimal systemic absorption
Pellets - implanted under the skin, deliver hormones over months. Less consistent dosing than other delivery methods; not FDA-approved for this use

The delivery method matters and should be part of the conversation with your prescriber. Transdermal (skin-based) delivery is generally considered to carry lower clot risk than oral forms, which is clinically meaningful for some patients.

Bioidentical vs. conventional HRT

Bioidentical hormones are chemically identical to the hormones your body produces. Conventional HRT may use synthetic hormones that are structurally similar but not identical. The distinction matters less in practice than it’s sometimes marketed to suggest.

FDA-approved bioidentical options exist - estradiol patches, gels, and micronized progesterone (Prometrium) are all bioidentical and well-studied. These are what most clinical guidelines refer to when they recommend “the safest available options.”

Compounded bioidentical hormones - custom-made at compounding pharmacies - are a different matter. They are not FDA-approved in the same way as manufactured drugs, lack standardized dosing, and have not been studied as rigorously. Some patients prefer them; the evidence comparing them to FDA-approved bioidentical options is not settled. If you’re considering compounded hormones, ask your provider why they’re recommending compounded over approved options for your specific situation.

Online HRT programs

Telehealth platforms now make it possible to access a licensed clinician for hormone evaluation, prescription, and follow-up without an in-person visit. For women who don’t have ready access to a menopause specialist, this has meaningfully improved access to appropriate care.

The quality of online HRT programs varies significantly. The most important factors to look for: clinicians with specific experience in menopause and hormone health, insurance compatibility if you need it, a treatment approach that considers your full medical history, and ongoing follow-up rather than just a one-time prescription.

See our HRT programs comparison for a full breakdown of the major online options.

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Frequently asked questions

HRT replaces or supplements hormones that decline during menopause or perimenopause. It most commonly relieves hot flashes, night sweats, vaginal dryness, sleep disruption, and mood changes. It may also support bone density and cardiovascular health in appropriate patients. Individual results vary significantly.

HRT safety depends on the type, delivery method, dose, and your individual health history. Current guidance from major menopause organizations supports HRT for appropriate candidates, particularly women under 60 or within 10 years of menopause onset without contraindications. The risk picture is more nuanced than the 2002 WHI study suggested. A clinician who specializes in hormone health is the right person to evaluate your specific situation.

Bioidentical hormones are chemically identical to those your body produces. Conventional HRT may use synthetic analogs. FDA-approved bioidentical options (estradiol, micronized progesterone) are available and well-studied. Compounded bioidenticals are not FDA-approved in the same way and have less standardized evidence. Discuss both options with a knowledgeable clinician.

Some women notice improvement in hot flashes and sleep within 2 to 4 weeks. Full symptom relief typically takes 2 to 3 months. Bone density effects occur over longer time frames. Individual timelines vary based on the specific hormones used, delivery method, and dose.