Estrogen dominance in menopause:
Many women are told that menopause symptoms are simply the result of “low estrogen.” Hot flashes, mood swings, night sweats, and stubborn weight gain all get blamed on estrogen deficiency and often treated with estrogen. But the truth is more nuanced.
Hormones don’t necessarily vanish in menopause, they shift. And for many women, estrogen doesn’t decline as rapidly as we’ve been led to believe. In fact, it can become dominant, especially when progesterone, our calming, balancing hormone, drops off first.
This state of estrogen dominance is often at the root of menopause-related symptoms. When estrogen goes unopposed by progesterone, it can disrupt nearly every system in the body, from mood and metabolism to sleep and detoxification.
The importance of progesterone:
As women approach menopause and ovulation slows, ovarian production of progesterone drops off sharply. Unlike estrogen, which can still be made by other tissues like fat tissue, progesterone is only produced in significant amounts by the ovaries. So when ovulation stops, progesterone takes a steep dive—and that’s when symptoms like anxiety, insomnia, irritability, and weight gain often begin.
Progesterone is one of the most vital hormones in a woman’s body, and its role extends beyond fertility or pregnancy. Think of it as your built-in buffer against stress, inflammation, and imbalance. Just as testosterone is essential for a man’s health, progesterone is foundational for women. You wouldn’t tell a man he doesn’t need testosterone if he’s not trying to conceive—so why do we dismiss the importance of progesterone for women who aren’t having children?
The truth is, progesterone is essential at every stage of life. So while the focus has mostly been on estrogen, progesterone often deserves equal or greater attention.
So what keeps estrogen high in menopause?
While ovarian estrogen production typically declines, several other factors can keep estrogen elevated:
- Environmental exposure: xenoestrogens, synthetic compounds that mimic estrogen, are common in plastics, pesticides, and personal care products. They accumulate in fat tissue and disrupt the body’s natural hormonal balance.
- Phytoestrogens: exposure to phytoestrogens like soy and flax are often promoted as health foods, but they can add to the body’s total estrogen load.
- Endogenous production in fat tissue: estrogen is still produced in body fat through a process called aromatization, especially in women with higher body fat percentages.
- Stress and inflammation: physical and emotional stress, as well as tissue injury, can trigger the release of estrogen as part of the body’s repair response.
Estrogen can be stored in the tissues. There are two primary mechanisms behind estrogen storage and production in fat tissue:
- Aromatase: An enzyme within fat cells that converts androgens (like testosterone) into active estrogens.
- Stress-induced estrogen production: When tissues experience stress or injury, local estrogen synthesis increases.
This ability for every cell to produce estrogen is a remarkable survival strategy. Estrogen promotes cell proliferation and division. This is essential for repairing or regrowing tissues after an injury.
Relying solely on centralized estrogen production (like in the ovaries) would be inefficient and risky for rapid healing. Instead, the body allows localized estrogen synthesis wherever and whenever it’s needed.
Estrogen is stored primarily as estrone in fat, which is less potent than estradiol (the active form). Storing estrogen in an inactive form prevents constant exposure to active estrogen, which could overstimulate tissues and disrupt normal cell function.
There are a lot of arguments that estrone is insignificant because it is less potent, however, estrone can be converted into estradiol and vice versa. This ability allows for the body to make the type of estrogen it needs on demand. The body is truly miraculous!
Stored estrone acts like a hormone reserve. Under the right conditions (like stress, inflammation, or enzyme activity), it can quickly become highly active and stimulatory.
A recent study in The Journal of Clinical Endocrinology & Metabolism (2025) found that despite lower serum estrogen levels, postmenopausal women, especially those on hormone therapy (HT), often still had substantial amounts of estrogen in their fat tissue, where it can be converted back into active forms and influence the body over time. Researchers found:
Women on HT showed 4‑ to 7‑fold higher concentrations of estrone and estradiol in both subcutaneous and visceral adipose tissue compared to non-users. Importantly, the ratio of estrogen levels in adipose tissue versus serum remained high in women on HT.
This table from the study shows estrogen levels in blood and fat tissue of postmenopausal women using topical hormone therapy.
- Serum: Blood levels
- Sc (Subcutaneous fat): Fat directly under the skin
- Visc (Visceral fat): Deeper abdominal fat
Estrone sulfate (E1S) in the blood (serum) is measured at 1200 pmol/L, which falls within the normal reference range of 600–1750 pmol/L. However, estrogen is also present in fat tissue at high concentrations: estrone (E1) was 814 pmol/L in subcutaneous fat and 1629 pmol/L in visceral fat (with reference ranges of 586–1636 and 525–, respectively).
Even when these values are “within range,” the fact that visceral fat E₁ levels nearly double subcutaneous levels (1629 vs. 814) suggests preferential estrogen accumulation in deep fat stores, especially with transdermal delivery. This could still translate into a high tissue-level estrogenic effect, particularly in organs adjacent to or influenced by fat (like the breast).
Even if individual values aren’t flagged as extremely high, the combined presence of estrogen in blood and multiple fat compartments, especially with visceral levels nearing the top of the range, adds up to a significantly elevated total estrogen load.
This is especially important because:
- Fat tissue acts as a reservoir for estrogen, especially with transdermal/topical use.
- Visceral fat (deep abdominal fat) is metabolically active and can convert precursors to active estrogens, fueling a local estrogenic environment.
- This estrogen stored in tissue isn’t measured in routine bloodwork, meaning women could have “normal” labs but still be experiencing high cumulative estrogen exposure at the tissue level.
Ideally, I like to see a progesterone-to-estrogen ratio in the range of 200 to 500. This reflects a more protective hormonal environment. But when that ratio drops below 100, it signals a state of relative estrogen dominance, a pattern I see in nearly every woman with estrogen receptor–positive (ER+) breast cancer.
In this case, both blood and tissue samples show ratios far below 100, confirming a clear deficiency in progesterone relative to estrogen.
Because estrogen can be stored in tissues which is not detectable on standard blood tests, I always like to monitor symptoms. These are often the tell-tale signs of estrogen dominance:
- Poor sleep
- Fibrocystic breasts
- Bloating or digestive issues
- Low libido
- Fatigue or energy crashes
- Brain fog or difficulty concentrating
- PMS-like symptoms even without a cycle
- Cold hands and feet (often due to thyroid suppression)
- Increased irritability or emotional sensitivity
- Cramping without a period
- Irregular bleeding or spotting
- Water retention
- Weight gain
- Insomnia or sleep disturbances
- Mood swings, anxiety, or depression
- Hair thinning or hair loss
- Headaches
These symptoms don’t necessarily mean you need more estrogen, in fact, they often mean the opposite: that estrogen is unopposed. That’s why it’s essential to assess the whole picture before starting estrogen therapy and to consider whether supporting progesterone and thyroid function might resolve symptoms more effectively and safely.
So how do you know if you need estrogen HRT?
Interestingly, not everyone with menopausal symptoms who receives estrogen actually benefits from it when alternated with a placebo. And studies comparing the two have shown that patients receiving a placebo actually experienced similar results! A review of double-blind placebo-controlled trials concluded that various HRT regimens used for more than 1 year caused more harm than good. While it is possible that those who feel better on estrogen therapy do have an estrogen deficiency, estrogen is not the only factor at play. For example, elevated estrogen can cause the thyroid to release more hormones in response, making the symptomatic patient feel much better.
For this reason, I begin by supporting progesterone, the thyroid, nutrient status, and metabolic health—factors that are often depleted or overlooked during the menopausal transition. Estrogen may offer temporary symptom relief, but it carries much higher risks and if the foundation isn’t stable, it can easily tip the body into imbalance.
A better option: The ALL Method
The ALL Method is a way to support the body through menopause, prioritizing safer and more effective therapeutic tools before using estrogen. It involves using the protective hormones first to resolve symptoms. If they persist, then I use estrogen, however it’s important to know that it carries risks (for ex: linked to breast cancer, blood clotting, etc.).
- Progesterone. Because of the massive decline in progesterone that happens in menopause, supplementing it is the first line of defense against unwanted symptoms. It helps to balance estrogen, stop night sweats, improve sleep, and lower stress.
- DHEA. An important youth hormone, levels of DHEA also rapidly decline with age. While it should be used in low doses, it can significantly lower the cortisol that increases during the menopausal years.
- Pregnenolone. This hormone is the precursor to almost every steroid hormone, and can help replace what is lost in menopause, effectively filling in the gaps.
- Thyroid. Levels of thyroid hormone also will often decrease with age, especially in women. Supplementing natural desiccated thyroid can help with fatigue, weight gain, and brain fog.
- Estrogen-only if still needed. Some women find that they still need a small amount of estrogen to alleviate symptoms. Using it should be done with caution, and it should never be taken orally. Applying a small amount of cream should be all that’s needed.
- Don’t forget to address the basics! Sleep, sunlight, movement, and nutrition.