The HRT Revolution: Debunking the Myths & Truths Behind Hormone Replacement Therapy (+ How It Can Help with Fatigue, Weight Gain, Brain Fog, Low Libido & More)

In my telehealth functional medicine clinic, I have seen hundreds of women in perimenopause and menopause over the years dealing with debilitating fatigue, stubborn weight gain, brain fog, anxiety, poor sleep, and low libido. But they are now coming to me with more awareness that what they are facing is not just “part of getting older”. They’re signs of a profound hormonal transition that deserves attention and solutions rather than dismissal.

Once considered taboo, hormone replacement therapy is gaining traction in both functional and conventional medicine as a powerful tool for reclaiming women’s health during this transitional period of life. However, there is still confusion with some people claiming it is completely safe while others are still wary of taking the leap. As often the case though in functional medicine, the answer is far more nuanced than a simple yes or no.

The truth is that much of what we’ve believed about hormone replacement therapy for the last two decades has been shaped by outdated interpretations of research that modern science has since revisited. Today, a growing body of evidence is challenging long-held assumptions and sparking what many experts are calling an HRT revolution. Let’s separate the myths from the facts and explore why HRT deserves a second look.

Understanding the hormone shift

Before we get into the details of hormone replacement therapy, we first need to fully understand the role hormones play in our overall health, and what happens when they start to shift and become dysregulated during menopause. Your hormones act as chemical messengers, sending directions between the different systems in your body to ensure various physiological processes run optimally.

Working together, your hormones are responsible for maintaining healthy metabolism, libido, reproduction, mood, homeostasis, sleep-wake cycles, growth and development, and more. But when these messengers fall out of sync, it can lead to a cascade of symptoms and chronic health issues.

Estrogen is one hormone in particular that undergoes a huge shift during this time of life. Often referred to as the female sex hormone, its role goes far beyond reproductive health and actually helps regulate multiple areas of your health:

• Cognitive function
• Neurotransmitter production
• Protection against bone loss and osteoporosis
• Muscle maintenance
• Cholesterol metabolism
• Insulin sensitivity
• Skin elasticity
• Vaginal and urinary health
• Sleep quality
• Mood regulation

This is why, when estrogen levels fluctuate during perimenopause it can feel like someone suddenly dimmed the lights on your health. What most people misunderstand about menopause is that it is so much more than just the end of your reproductive years. In reality, menopause is a shift that affects every aspect of your wellbeing.

What is hormone replacement therapy?

This is where hormone replacement therapy — or HRT for short — comes into play. Also referred to as menopausal hormone therapy, HRT supplements estrogen and progesterone in order to restore declining levels of these hormones that often occur during perimenopause and menopause. Depending on your specific case, you could be prescribed one of two methods: 

• Combined therapy: Estrogen and progesterone (or a synthetic progestin) are prescribed and administered alongside each other.
• Estrogen therapy: Just as it sounds, estrogen is the only hormone prescribed in this form of estrogen replacement therapy. This method is only prescribed to women who have had a hysterectomy because progesterone is necessary to protect the uterine lining (which you no longer have after a hysterectomy) from the risk of developing endometrial cancer from estrogen-only therapies.

You can also administer these hormones in a multitude of ways depending on your symptoms. Your doctor may prescribe systemic therapy that utilizes pills, capsules, gels, skin patches, or vaginal rings to deliver hormones throughout your entire body, or your doctor may prescribe low-dose vaginal therapy that utilizes creams or rings to administer hormones directly into the vagina for more targeted symptom support.

The HRT Revolution

If you’re reading this and thinking that HRT sounds like the perfect solution to your hormone woes, you aren’t alone. If we turn to other nutritional supplements to correct nutrient deficiencies, why would hormone replacement therapy be any different? Well, let’s take a look at where the controversy all started. 

In 2002, a landmark Women’s Health Initiative (WHI) study drastically changed our perspective on HRT. (1) Results of the study showed that hormone replacement therapy was associated with an increased risk of developing breast cancer, heart disease, stroke, and blood clots. At first glance, that would make anyone want to take a step back from HRT in favor of other treatments. But the research wasn’t accurate to what most women are using HRT for. 

Instead of looking at women in early stages of menopause, they were looking at how HRT affected women a decade or more past when menopause typically occurs. Plus, a lot of these women also had other health problems like cardiovascular disease. Together, these two factors make it nearly impossible to evaluate the true risks of HRT in women actually going through this transition when this therapy is typically prescribed.

The study also only looked at one type of hormone replacement therapy, eliminating the nuance of bioindividuality and the continued advancements HRT has made with formulations, delivery methods, and research over the last two decades since that study was first published.

Here’s where the revolution begins. In 2026, the FDA finally told drug companies to remove all box warning risk statements for hormone replacement therapy regarding breast cancer, cardiovascular disease, and dementia. (2) This wasn’t without good reason though. 

Through continued research into hormone replacement therapy, the results were undeniably in favor of HRT as a beneficial treatment. In fact, an analysis of close to 120 million patient records found that early use of hormone replacement therapy was associated with a 60% percent lower risk of dementia, breast cancer, and heart disease….basically the exact opposite of what the original study tried to warn against! (3)

Unfortunately, only 5% of women are currently prescribed hormone replacement therapy when there are so many more who could likely benefit from it. Removing the warning label is the first step in the right direction, but there is still more work that needs to be done in order to reverse the decades of fear mongouring around HRT and the treatment of menopausal symptoms. 

READ MORE: Can Supplements Help With Menopause? Let’s Talk About It And 16 Of My Top Picks

Who Might Benefit from Hormone Replacement Therapy?

Now that we’ve removed some of the stigma from hormone replacement therapy, one of the most common questions I get from women considering HRT is whether or not they need it. Since everyone’s biochemistry is different, there is no universal checklist for determining if HRT is right for you. We aren’t playing a medicinal matching game. But with that said, if you are experiencing the following symptoms and are within the age range of perimenopause, HRT might be worth considering:

• Hot flashes or night sweats
• Chronic fatigue
• Brain fog
• Mood swings
• Irritability
• Anxiety
• Poor sleep quality or insomnia
• Vaginal dryness
• Low libido
• Weight gain
• Weight loss resistance

It is important to note that if you have had a history of certain conditions, hormone replacement therapy may not be the right choice for you:

• Breast cancer, ovarian cancer, or uterine cancer
• Blood clots
• Heart attack
• Stroke
• Liver disease
• Unexplained vaginal bleeding
• Cardiovascular conditions
• Pregnancy and breastfeeding

LISTEN: Functional Medicine Is The Cake: Longevity Labs, HRT, Peptides, DEXA Scans & What Actually Is Worth Your Money | Dr. Robin Berzin

When should I start hormone replacement therapy?

One of the biggest takeaways from the current research is that timing does matter. Starting HRT as close as possible to the beginning of menopause resulted in the greatest risk reduction and benefits than in women who started later during menopause or afterwards. Ultimately, hormone replacement therapy isn’t designed to correct problems after they have occurred. Instead, HRT works best when your hormones start to shift in order to ease the long-term burden of chronic hormone imbalances.

Bioidentical vs. Synthetic Hormones

Another question I often receive is whether or not you should choose bioidentical or synthetic hormones. The answer isn’t necessarily straightforward, but understanding the differences can help you make a more informed decision with your practitioner on what is right for you. 

• Bioidentical hormones: These are chemically identical to the hormones that your body naturally produces on its own and are typically derived from plant-based sources like yams. 
• Synthetic hormones: These manufactured compounds can differ slightly in structure to the hormones that your body produces.

While it’s easy to assume that bioidentical hormones would be the preferred choice, it really comes down to bioindividuality. In functional medicine we consider everything from age, how long a person’s been in menopause, symptoms, medical history, and preferred delivery method before concluding which option is best. By moving away from the “one-size-fits-all” approach, we can begin to open more doors to leveraging HRT for the better.

The Takeaway

I am relieved that HRT is finally getting the recognition it deserves. For years so many women have had to suffer through their symptoms, from hot flashes to breast tenderness, while a powerful treatment option sat on the sidelines due to misinformation and fear. Even though HRT still might not be for everyone, the new research opens up the possibility for more women to have conversations with their doctors that could dramatically change how they feel. In my telehealth functional medicine clinic, we approach each person’s case with grace and nuance, factoring in every aspect of their health and lifestyle to put together the plan that works best for you, whether that includes HRT, dietary changes, or targeted nutritional supplements like my Hormone Stack for Cycling Women or my Hormone Stack for Menopausal Women to support the ebbs and flows of this new season of life.

As one of the first functional medicine telehealth clinics in the world, we provide webcam health consultations for people around the globe. 

Photo: Unsplash.com

Sources

• Writing Group for the Women’s Health Initiative Investigators. Risks and Benefits of Estrogen Plus Progestin in Healthy Postmenopausal Women: Principal Results From the Women’s Health Initiative Randomized Controlled Trial. JAMA. 2002;288(3):321–333. doi:10.1001/jama.288.3.321
• U.S. Food and Drug Administration. (2025). Hormone replacement therapies can help women with bothersome menopausal symptoms. https://www.fda.gov/consumers/consumer-updates/hormone-replacement-therapies-can-help-women-bothersome-menopausal-symptoms
• The Menopause Society. (2025, October 21). When women initiate estrogen therapy matters: New large-scale analysis shows potential long-term benefits of initiating hormones during perimenopause [Press release]. https://menopause.org/wp-content/uploads/2025/10/Timing-of-Estrogen-Therapy-Peri-or-Post_10-23-25.pdf