HRT Explained: What Hormone Therapy Is and How to Think About It

The short answer: hormone therapy (HRT) replaces the estrogen (oestrogen), and for women with a uterus the progesterone, that the ovaries reduce during the transition, and it is the most effective treatment for many menopausal symptoms. It comes in many forms, patches, gels, sprays, tablets and more, and the modern picture is meaningfully different from the fear that took hold after a single early-2000s study, which studied older women and hormone types less commonly used today. For most healthy women with troublesome symptoms who start in their forties or early fifties, the current consensus among menopause specialists is that the benefits outweigh the risks, though it is always an individual decision. This is not a recommendation to take HRT; it is an orientation so you can have a genuinely informed conversation with your doctor.

Few topics in women’s health carry as much confusion, fear and conflicting information as hormone therapy. Women who want it are sometimes told they should not have it; women who would benefit do not always know to ask; and the fear around it, largely rooted in headlines from twenty years ago, has not kept pace with how the evidence has evolved. The result is that a lot of women are making decisions based on outdated information, either avoiding a treatment that could genuinely help them or feeling guilty about one they are already benefiting from. This article aims to cut through that: a clear look at what HRT actually is, where the evidence now stands, and what questions are worth bringing to your doctor.

What hormone therapy actually is

Hormone therapy, sometimes called HT or HRT, replaces the hormones the ovaries stop producing reliably during the transition, principally estrogen, which is responsible for relieving most symptoms, and progesterone (or a progestogen) for women who still have a uterus. The progesterone component is essential in that case because estrogen given on its own would thicken the womb lining and raise the risk of endometrial cancer; progesterone protects against that. Women who have had a hysterectomy can usually take estrogen alone. Some women also benefit from testosterone, chiefly for libido, though it is prescribed separately and less routinely.

HRT comes in many forms, and the choice matters. Estrogen can be delivered through skin patches, gels and sprays or as tablets, and increasingly the transdermal (through-the-skin) routes are preferred because, unlike tablets, they are not associated with an increased risk of blood clots. Progesterone can be taken as a tablet or delivered by a hormone-releasing coil (IUS). There is also an important distinction between body-identical (micronised) hormones, which have the same molecular structure as those your body makes and tend to be better tolerated, and older synthetic versions; body-identical estrogen and progesterone are now widely used and are different again from unregulated “bioidentical” compounded products, which specialists generally advise against. These differences are worth a detailed conversation with your prescriber.

The study that changed everything, and its limitations

In the early 2000s a large study (the Women’s Health Initiative) linked certain types of combined hormone therapy to increased risks of breast cancer and cardiovascular events. The findings were reported dramatically, prescriptions collapsed almost overnight, and a generation of women stopped or avoided HRT entirely, while a generation of doctors became wary of prescribing it. The fear it generated has been remarkably persistent, and it still shapes many women’s instincts today.

What followed, though, was a substantial re-evaluation. The study’s participants were considerably older on average than the women who typically start HRT for symptoms, many were more than a decade past menopause, and the specific hormone types and oral delivery used differ from much of what is prescribed now. When the absolute risks were re-examined and broken down by age, the picture was far more nuanced and reassuring than the headlines suggested, particularly for women starting in their forties and early fifties. Major medical societies have since updated their positions, and the current specialist consensus is meaningfully different from where it stood twenty years ago. If your fear of HRT is based on what you absorbed in the early 2000s, it is genuinely worth revisiting with current information, which we cover in depth in our guide to what the evidence says about HRT safety.

What HRT can help with

HRT is the most effective treatment for hot flashes and night sweats, typically reducing them substantially, and it treats a wide range of other symptoms at the same time. Many women find it improves sleep, mood and anxiety, brain fog, joint aches and the general sense of not feeling like themselves, largely by steadying the hormonal environment that is driving those symptoms. Vaginal and urinary symptoms (GSM) respond particularly well, and local vaginal estrogen is a low-dose option specifically for those, considered very safe and usable by many women who cannot or choose not to take systemic HRT, as our guide to vaginal dryness and GSM explains.

Beyond symptom relief, HRT has well-established benefits for bone health: taken during the transition, estrogen preserves bone density and reduces the risk of fractures, including at the hip and spine, which matters a great deal given how fast bone is lost around menopause, as covered in our guide to bone density and menopause. For women with early menopause or premature ovarian insufficiency, HRT is particularly important and generally recommended at least until the average age of natural menopause, because it replaces hormones the body would otherwise still be producing and protects bone and heart health over those extra years.

Who it is generally appropriate for

HRT is considered appropriate for many women with significant menopausal symptoms and no specific contraindications, and for most healthy women who start within about ten years of menopause or before the age of 60, the benefits are generally judged to outweigh the risks. Women with a personal history of certain hormone-sensitive cancers (such as some breast cancers), unexplained vaginal bleeding, active liver disease, or a history of blood clots or certain cardiovascular conditions will need more individualised guidance, and in some cases HRT will not be suitable, though non-hormonal options exist.

Timing is part of the conversation too. Current thinking, sometimes called the “timing hypothesis”, suggests that starting HRT earlier in the transition rather than many years after menopause is associated with a more favourable risk-benefit balance, particularly for the heart. This is why it is worth discussing sooner rather than assuming you should wait until symptoms are severe. The decision is genuinely individual, weighing your symptoms, health history, personal risk factors and preferences, which is exactly why it should be made with a doctor who is current in menopause care rather than on the basis of general headlines. Our guides to how to get an HRT prescription and getting the most from your appointment can help.

What to ask your doctor

Going in prepared makes the conversation far more productive. Useful questions include: what form of HRT would you recommend for my symptom profile, and why; what is the risk picture specific to my health history; why are you suggesting this type and route (for example, a patch or gel rather than a tablet); how and when will we review whether it is working; how long might I stay on it; and what are the alternatives if HRT is not right for me. It also helps to mention your priorities, since the same treatment can be optimised differently for someone whose main problem is hot flashes versus mood versus vaginal symptoms.

It is normal for HRT to need some adjustment, of dose, type or delivery, in the first few months to get it right, so a follow-up conversation is part of the process rather than a sign of failure. If you feel dismissed, not listened to, or given advice that seems out of step with current guidance, seeking a second opinion from a menopause specialist is entirely reasonable, and the Yellow directory can help you find practitioners with menopause expertise. HRT is not the right choice for everyone, and it is not the only option, but every woman deserves to make that decision based on accurate, current information rather than decades-old fear.

Frequently Asked Questions

Is HRT safe?

For most healthy women with troublesome symptoms who start within about ten years of menopause or before age 60, the current specialist consensus is that the benefits generally outweigh the risks, and the picture is far more reassuring than the early-2000s headlines suggested. Risks vary by the type, dose, delivery route and your personal health history, so “safe” is individual rather than universal. Our dedicated guide to what the evidence says goes into the specifics, and your doctor can assess your particular situation.

What is the difference between body-identical and synthetic HRT?

Body-identical (micronised) hormones have the same molecular structure as those your body produces and are now widely prescribed, with body-identical progesterone in particular tending to be better tolerated, including neurologically, than older synthetic progestogens. This is different from unregulated “compounded bioidentical” products sold privately, which specialists generally advise against because they are not regulated or quality-controlled. The distinction is worth discussing with your prescriber so you understand exactly what you are being offered.

Does HRT cause weight gain?

No good evidence shows that HRT causes weight gain. Weight changes around this time are driven mainly by ageing, muscle loss and the hormonal shift itself rather than by HRT, and by relieving symptoms such as poor sleep and hot flashes, HRT can actually make it easier to stay active and manage weight through lifestyle. If you notice bloating or other effects when starting, that often settles or can be addressed by adjusting the type or dose with your doctor.

How long can I stay on HRT?

There is no arbitrary time limit, and the old idea that HRT must be stopped after a fixed number of years is outdated. How long to continue is an individual decision, reviewed periodically with your doctor, weighing your ongoing symptoms, benefits (including for bone health) and any changing risk factors. Many women stay on it for years, and for those with early menopause it is generally recommended at least until the average age of natural menopause. The key is regular review, not a preset cut-off.

Can I take HRT if I still have periods?

Yes. HRT can be started in perimenopause while you are still having periods, and in fact starting earlier in the transition is often associated with a favourable risk-benefit balance. The type and regimen may differ from that used after periods have stopped, for example a cyclical regimen that produces a monthly bleed, so it is tailored to where you are in the transition. Discuss your cycle and symptoms with your doctor so the regimen fits your situation.

What if HRT is not right for me?

There are effective non-hormonal options. For hot flashes, certain antidepressants, gabapentin, clonidine and the newer drug fezolinetant have evidence, and CBT helps with symptoms and sleep; for vaginal symptoms, non-hormonal moisturisers and low-dose local estrogen (often suitable even for many who avoid systemic HRT) help; and lifestyle measures support mood, sleep and bone. If you cannot or prefer not to take HRT, a doctor current in menopause care can help you build an alternative plan tailored to your symptoms.

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