Tender breasts before a period, cycles that draw closer, bleeding that turns heavier, water retention, an irritability that climbs through the second half of the cycle: millions of women live this cluster of signs as a monthly inevitability. Behind those symptoms often sits the same imbalance, which is not a disease but a skewed balance of power: oestrogens weigh too heavily against progesterone. This is oestrogen dominance, the most widespread female hormonal imbalance, and probably the least named. Chinese dietetics recognises it at once: it calls it a stagnation of Liver Qi that ends by freezing the Blood.
Oestrogen dominance: too much oestrogen or too little progesterone
The term describes a ratio, not an absolute. Two situations produce the same imbalance: oestrogens are too high against normal progesterone, or oestrogens are normal against progesterone too low. Both give the same clinical profile, because the two hormones work as a pair: oestrogen proliferates (it thickens the endometrium, stimulates the breasts), progesterone stabilises (it matures the endometrium, calms proliferation, supports implantation).
Across the menstrual cycle, that balance changes hands twice: oestrogen leads the first (follicular) phase, progesterone the second (luteal) one. When ovulation falters (anovulatory cycles, stress that cuts progesterone, the onset of perimenopause), or when oestrogens accumulate (excess production, insufficient breakdown, environmental load), the balance tips. The woman feels the excess of one or the absence of the other as the same unease.
The three causes: production, breakdown, xenoestrogens
Dominance does not arrive through a single channel. Three mechanisms can install it, alone or combined.
Excess production. The enzyme aromatase, present in fat tissue, converts androgens into oestrogens: the more adipose tissue (especially abdominal), the more local oestrogen production rises. This is the mechanism that links inflammatory obesity to hormonal imbalance. Pregnancy and perimenopause also shift ovarian output, physiologically this time.
Insufficient breakdown. Spent oestrogens do not vanish: the liver converts them into excretable metabolites, then the gut clears them. If the liver is congested (alcohol, overload, missing cofactors) or transit stalls, oestrogens are reabsorbed into the circulation instead of being eliminated. This is where the liver becomes hormonal in the strict sense.
The xenoestrogenic load. Industrial molecules mimic oestrogen: bisphenol A in plastics and thermal receipts, phthalates in cosmetics and packaging, certain pesticides, residual oestrogens in waste water. Taken separately the doses are small; taken together, day after day, they add to the hormonal load. The measure is simple: stop heating plastic, filter the water, choose short-list cosmetics.
The hormonal liver: the 2-OHE and 16-OHE pathways
The liver does not “burn” oestrogens: it methylates and hydroxylates them at precise positions, and the choice of position makes all the difference. Hydroxylation at position 2 produces 2-hydroxyoestrone (2-OHE), a mild and protective metabolite; the other, at position 16, produces 16-hydroxyoestrone (16-OHE), proliferative and aggressive. The 2/16 balance is the most interesting ratio in the female hormonal work-up: the more the 2 dominates, the healthier the profile.
That ratio is not fixed. Crucifers (broccoli, cabbage, cauliflower, Brussels sprouts, rocket) contain indole-3-carbinol and sulforaphane, which push the 2-OHE pathway: this is why studies on hormone-dependent prevention insist so much on that vegetable family. Fibre handles the second step: it captures conjugated oestrogens in the gut and carries them out, cutting reabsorption short. And magnesium, B6 and folate act as cofactors for the methylation that completes the breakdown.
The article on the endocrine network and hormonal balance unfolds this role of the liver in the wider regulation.
The TCM reading: Liver Qi stagnation and Blood stasis
Chinese dietetics never named oestrogens, but it has described their clinical signature for two thousand years: the stagnation of Liver Qi.
In TCM the Liver is the organ of free flow: it moves Qi, Blood and the emotions, and it stores Blood between periods. When Liver Qi stagnates (stress, swallowed frustration, excess sweet and fatty food that engorges the Centre), the blood stagnates in turn: it is the pairing of Qi stagnation + Blood stasis that produces exactly the picture of oestrogen dominance: tender breasts (Qi no longer descends along the Liver meridian that crosses them), painful periods with clots (Blood stasis), premenstrual irritability (blocked Qi heating up), disrupted cycles (the Liver no longer regulates the release of blood).
| TCM terrain | Modern correspondence | Clinical signs | ||
|---|---|---|---|---|
| Liver Qi stagnation | Functional blockage | Liver | Irritable PMS, tender breasts, bloating, irregular cycles | Moderate Sour flavour, citrus, walking, breathing, reduce alcohol |
| Blood stasis | Fixed congestion | Liver, Chong Mai | Heavy periods with clots, fixed pain, fibroids | Turmeric, onions, seaweeds, green leaves, gentle warmth |
| Centre Dampness-Phlegm | Turbid accumulation | Spleen | Water retention, hormonal weight gain, greasy tongue coating | Reduce sweet-dairy-fried; Job's tears, whole grains |
Correspondences between modern mechanisms and Chinese patterns
The point of convergence is striking: the liver that breaks down oestrogens poorly in modern medicine is exactly the Liver that no longer moves Qi in TCM. Both models say the same thing in two vocabularies.
The protocol: crucifers, fibre, hepatic support
The dietary strategy articulates three gestures acting at the three levels of the problem.
Pushing the 2-OHE pathway. Two portions of crucifers a day (broccoli, cabbage of every family, rocket, radish) are the best-documented measure: indole-3-carbinol shifts the metabolism pathway within weeks. Sulforaphane from young broccoli shoots (the sprouts hold twenty times more than the mature vegetable) is the most active compound. Add turmeric with pepper, which supports phase II hepatic detoxification.
Ensuring clearance. At least 30 g of fibre a day, including insoluble fibre that captures oestrogens: whole grains, ground flaxseed (which also supplies lignans, moderating phytoestrogens that occupy the receptors without stimulating them), pulses, apples with skin. Transit is the emergency exit for hormonal overload; regulating it regulates half the problem.
Easing the TCM Liver. In the Chinese reading, the Sour flavour is the one that moves Liver Qi: lemon on waking, cider vinegar as seasoning, lacto-fermented pickles as garnish. Citrus and their zests (the famous Chen Pi, dried tangerine peel) disperse stagnation. Alcohol, which loads the liver at the very moment it must process hormones, is frankly reduced. Meals taken calmly, without tension, loosen blocked Qi as much as any food.
Frequently asked questions about oestrogen dominance
How do I know if I have oestrogen dominance?
The cluster of signs matters more than a single reading: tender breasts, heavy periods, water retention, marked PMS, shortened cycles. A saliva or blood panel of the oestradiol/progesterone ratio in the luteal phase (day 21 of a 28-day cycle) makes the imbalance objective. The physical signs are often enough to start the dietary protocol.
Do phytoestrogens worsen dominance?
No, quite the opposite. Flax lignans and soy isoflavones are modulators: they occupy the receptors without stimulating them as much as the body’s own oestrogen, softening the effect of the overload. Regular intake of ground flaxseed is associated with an improved 2-OHE/16-OHE ratio. Phytoestrogens are regulators, not boosters.
Does the contraceptive pill play a part?
Combined pills supply a fixed dose of synthetic oestrogen that adds to the total load; some women see their dominance worsen on the pill. Progestin-only options or low-dose hormonal IUDs are sometimes better tolerated on this front. Contraception remains a medical decision, but it deserves to be weighed with this imbalance in mind.
How long before I see an effect?
The hepatic enzymatic changes (the 2-OHE pathway) are measurable in 4 to 8 weeks. The most sensitive symptoms (tender breasts, retention, PMS) often improve by the second cycle. Full regularisation, especially if the imbalance is longstanding, takes 3 to 6 months of steady practice.
The most ordinary imbalance, the best treated
Oestrogen dominance is not a rare or complicated disease: it is the most ordinary balance of power in the female cycle, the one that tips under the combined effect of stress, alcohol, sedentary life and the xenoestrogenic load. Both medicines, modern and Chinese, converge on the same protocol: move what stagnates (Liver Qi, the 2-OHE pathway), clear what accumulates (spent oestrogens, Centre Dampness), and reduce what clutters (alcohol, hot plastics, fast sugar). Three months of a coherent plate are often enough to reverse the ratio.
In the Yin Shi app, the food sheets give each product’s thermal nature and tropism: citrus zest ticks the boxes of the stagnating Liver, crucifers those of Qi wanting to move.
Further reading: the endocrine network and hormonal balance, the concept of Qi stagnation, PMS in TCM terms, endometriosis and Blood stasis, and the menstrual cycle in four phases.
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