The most effective way to increase estrogen levels is prescription hormone replacement therapy, which comes in pills, patches, gels, sprays, and vaginal rings. Beyond prescription options, certain foods, supplements, and minerals may have modest effects on estrogen activity, though none come close to the potency of medical treatment. What makes sense for you depends on why your estrogen is low and how much of a boost you need.
Prescription Estrogen Therapy
Hormone replacement therapy (HRT) is the only method proven to reliably and significantly raise estrogen levels. It comes in two main forms: estrogen-alone therapy and combination therapy that pairs estrogen with a progestogen. If you still have your uterus, you’ll need the combination version, because estrogen taken alone can cause the uterine lining to thicken abnormally over time. If you’ve had a hysterectomy, estrogen-alone therapy is typically the route.
Estrogen-alone therapy is available as pills, skin patches, topical gels, nasal sprays, and a vaginal ring that delivers hormones systemically. Combination therapy most commonly comes as pills or patches. Your doctor chooses the delivery method based on your symptoms, health history, and preference. Patches and gels, for instance, bypass the liver and carry a lower risk of blood clots compared to oral pills.
There’s also a localized option: topical vaginal estrogen, which comes as creams, tablets, inserts, and rings designed to treat vaginal dryness, irritation, and urinary symptoms without raising your overall blood estrogen levels much. If your main complaints are vaginal rather than whole-body symptoms like hot flashes or bone loss, this targeted approach may be all you need.
Risks of Estrogen Therapy
Combination HRT carries an increased risk of heart attack, stroke, blood clots in the lungs and legs, and breast cancer. These risks are higher if you smoke, and smoking while on estrogen therapy significantly raises the chance of clots and stroke. Estrogen-alone therapy has a somewhat different risk profile but still raises clot risk, particularly in oral form.
Certain conditions can rule out estrogen therapy entirely. A history of breast cancer, blood clots, stroke, or liver disease may mean your doctor advises against it. Other conditions that require careful evaluation include lupus, high blood pressure, high cholesterol, epilepsy, migraine headaches, endometriosis, gallbladder disease, and diabetes. If you’re facing surgery or extended bedrest, estrogen therapy is typically stopped four to six weeks beforehand to reduce clot risk.
Soy and Phytoestrogens
Soy contains isoflavones, plant compounds that are structurally similar to estrogen and can bind to estrogen receptors in your body. This makes them “phytoestrogens,” and they’re often the first thing people reach for as a natural alternative. The reality, however, is more complicated than “soy raises estrogen.”
Isoflavones act as weak estrogens in some tissues, which means they can partially fill estrogen receptors and produce mild estrogenic effects when your own estrogen is very low. But in a higher-estrogen environment, they can actually compete with your body’s stronger estrogen and dampen its effects. Research from the American Association for Cancer Research found that high-dose soy isoflavones (the human equivalent of 240 mg per day) reduced estradiol’s activity in tissue by over 50% when estrogen levels were already elevated. All isoflavone doses in that study resulted in lower circulating estradiol levels in a high-estrogen setting.
So soy isoflavones don’t straightforwardly “increase estrogen.” They modulate it. If your estrogen is very low, they may provide a mild estrogenic signal. If your levels are normal or supplemented, they may blunt estrogen’s effects. This dual behavior is why soy can help with mild hot flashes in some women while not acting as a true estrogen replacement. Dietary sources include tofu, tempeh, edamame, and soy milk.
Flaxseed and Lignans
Flaxseed is rich in lignans, another class of phytoestrogen. When you eat flaxseed, gut bacteria convert its main lignan into compounds called enterolactone and enterodiol, which interact with estrogen receptors. Like soy isoflavones, these don’t simply raise estrogen. They appear to shift how your body metabolizes estrogen rather than increasing production. Lignans compete with your body’s estrogen for receptor binding, which can alter estrogen-sensitive gene activity.
Lab studies suggest lignans may actually inhibit aromatase, the enzyme responsible for converting other hormones into estrogen. A systematic review and meta-analysis published in Frontiers in Nutrition found that flaxseed supplementation did not significantly change levels of key hormones including testosterone, sex hormone-binding globulin, or follicle-stimulating hormone compared to a control group. The overall picture is that flaxseed modifies estrogen metabolism in subtle ways but isn’t a reliable tool for raising total estrogen levels.
Boron
Boron is a trace mineral found in fruits, nuts, and leafy greens that has shown some connection to estrogen levels. In a USDA-funded study, perimenopausal women who took 2.5 mg of boron daily for 60 days showed changes in serum estradiol concentrations. The catch: the effect was influenced by the order in which women received the supplement versus the placebo, making the results harder to interpret cleanly.
Boron’s effect on estrogen appears to be real but modest. It also influenced markers related to bone mineral metabolism and thyroid function in the same study. You can get boron through diet (prunes, raisins, almonds, avocados) or as a supplement, but don’t expect it to substitute for hormone therapy if your levels are significantly low.
Herbal Supplements
Chasteberry (Vitex)
Chasteberry works primarily on the pituitary gland, where its active compounds bind to dopamine receptors and suppress prolactin release. High prolactin can disrupt the normal hormonal cascade that leads to estrogen and progesterone production, so lowering it can indirectly help restore balance. Interestingly, the effect is dose-dependent: low doses of chasteberry have been associated with lower estrogen and higher progesterone, while high doses mainly suppress prolactin without changing other hormone levels much. This means chasteberry is better understood as a hormonal regulator than an estrogen booster, and it’s most useful for people whose hormonal issues stem from elevated prolactin.
Black Cohosh
Black cohosh is widely marketed for menopausal symptoms, but it does not actually raise estrogen levels. The National Cancer Institute notes that current evidence refutes earlier claims of estrogenic activity for commercially available black cohosh extracts. Clinical studies have found no changes in circulating estradiol, follicle-stimulating hormone, or luteinizing hormone, and no estrogenic effects on breast, uterine, or vaginal tissue.
Its active compounds, called triterpene glycosides, look structurally similar to steroids but don’t bind meaningfully to estrogen receptors. The leading theory is that black cohosh relieves hot flashes through activity on the serotonin system instead. If you’re looking for symptom relief rather than an actual increase in estrogen, black cohosh may still be worth discussing with your provider, but it won’t move your estrogen numbers.
What Actually Works Depends on Your Situation
If blood tests show your estrogen is significantly low and you’re experiencing symptoms like hot flashes, night sweats, vaginal dryness, or bone density loss, prescription hormone therapy is the only option with consistent, measurable effects. Phytoestrogens from soy and flaxseed offer weak, modulatory activity that may take the edge off mild symptoms but won’t replace what your body has stopped producing. Boron has a small supporting effect. Herbal options like chasteberry address specific hormonal imbalances rather than broadly raising estrogen, and black cohosh doesn’t raise it at all.
The distinction between “raising estrogen levels” and “relieving low-estrogen symptoms” matters. Some of these options may help you feel better without changing your blood levels, while only HRT will reliably do both. Getting your hormone levels tested gives you a baseline, and understanding how far below optimal you are helps determine whether food-based approaches might be enough or whether you need medical treatment.