How to Increase Aromatase Activity Naturally

Aromatase activity is driven most powerfully by body fat, dietary fat intake, insulin signaling, and certain inflammatory and hormonal cues. The enzyme converts androgens into estrogens in tissues throughout the body, and its activity rises or falls in response to metabolic conditions you can genuinely influence through lifestyle choices. That said, the relationship between aromatase and health is not straightforward: more activity is not always better, and several popular “natural” supplements actually suppress aromatase rather than enhance it.

What Aromatase Does and Why Someone Would Want More of It

Aromatase is a cytochrome P-450 enzyme whose sole job is converting androgens like testosterone into estrogens like estradiol.¹ It operates in the ovaries and testes, but also in fat tissue, skin, bone, brain, and skeletal muscle. In premenopausal women, the ovaries produce most circulating estrogen, but after menopause, aromatase in fat and other peripheral tissues becomes the primary source. In men, aromatase provides the estrogen needed for bone density, cardiovascular function, and brain health.

People searching for ways to boost aromatase naturally typically fall into a few camps: postmenopausal women hoping to support estrogen levels without hormone replacement, men with low estrogen and related bone-health concerns, or anyone curious about whether diet and exercise meaningfully affect the enzyme. The honest answer is that several lifestyle factors do change aromatase activity in measurable ways, but the mechanisms are more nuanced than “eat this food and your estrogen goes up.”

Body Fat Is the Single Strongest Natural Driver

If there is one factor that reliably and substantially increases aromatase activity, it is body fat. Adipose tissue expresses aromatase at meaningful levels, and as fat mass increases, so does the total amount of aromatase-driven estrogen production. This is true in both men and women. Aromatase expression in adipose tissue increases as a function of body weight and advancing age.² Research on human adipose cells has shown that aromatization rates, measured per cell, climb with age independently of menopause or changes in circulating gonadotropins.³

This means that gaining body fat genuinely raises aromatase output. For a thin postmenopausal woman with very low estrogen, some amount of body fat provides an estrogen-producing base that would otherwise be absent. But the relationship is a double-edged sword. In obese individuals, adipose tissue shows altered expression of estrogen receptors and related enzymes, and the excess estrogen produced locally in fat can contribute to metabolic dysfunction, not just beneficial estrogen replenishment.⁴ In men, higher aromatase activity from excess body fat is a well-known contributor to gynecomastia, the development of breast tissue.⁵

So while maintaining a healthy body-fat level supports normal aromatase function, deliberately gaining fat to boost aromatase is a poor strategy. The downstream effects of excess adiposity overwhelm any benefits from modestly higher estrogen.

Dietary Fat Intake and Circulating Estrogen

What you eat affects aromatase output, and dietary fat is the most studied dietary lever. A study of postmenopausal Japanese women found that serum estrone and DHEAS concentrations rose by roughly 12% and 9%, respectively, with each 5% increase in the proportion of calories from total fat.⁶ The association held for saturated, monounsaturated, and polyunsaturated fat. In the other direction, a meta-analysis of dietary fat reduction trials found that cutting fat intake lowered serum estradiol by about 13% overall, with the biggest drops seen when fat fell below 12% of total calories.⁷

The practical takeaway: eating a diet with adequate fat, rather than an extremely low-fat diet, helps maintain the substrate and signaling environment in which aromatase can function normally. This does not mean loading up on fat is better. The dose-response curve plateaus, and the health consequences of very-high-fat diets bring their own problems. For someone eating a standard mixed diet, ensuring that fat is not aggressively restricted should keep this pathway running.

Exercise and Local Aromatase in Muscle

Exercise increases aromatase expression, but not necessarily in the places you might expect. In a study using ovariectomized rats as a model for postmenopausal estrogen loss, exercise training significantly increased aromatase expression and local estradiol production in skeletal muscle.⁸ The locally produced estrogen appeared to activate a signaling pathway involved in muscle maintenance, suggesting that exercise-driven aromatase is part of how physical activity protects muscle mass.

This finding has a key implication: even when ovarian estrogen production has stopped, regular exercise can stimulate tissues to produce their own estrogen locally through aromatase. The effect is tissue-specific rather than systemic, meaning it probably will not dramatically raise blood estrogen levels the way body fat does, but it provides estrogen right where the muscle needs it. For postmenopausal women or anyone with reduced gonadal hormone production, this is one of the clearest arguments for consistent resistance and aerobic training.

Insulin and Metabolic Signaling

Insulin plays a direct role in supporting aromatase gene expression. In bovine granulosa cells, withdrawing insulin reduced aromatase mRNA to undetectable levels and decreased estradiol production, while the rest of the steroid-producing machinery remained largely intact.⁹ In obese rats, both aromatase activity and insulin receptor expression in growth plate tissue were significantly higher than in lean controls.¹⁰

What this means in practice is that insulin is a permissive signal: aromatase needs it to function at full capacity. Severe caloric restriction, prolonged fasting, or poorly managed diabetes can all reduce insulin availability in ways that suppress aromatase. Conversely, hyperinsulinemia from insulin resistance may push aromatase activity higher than desired. The sweet spot for supporting healthy aromatase function is stable blood sugar and normal insulin sensitivity, the kind of metabolic profile that comes from regular meals, adequate carbohydrate intake, and physical activity. Crash dieting and chronic undereating are likely counterproductive if your goal is maintaining aromatase output.

Inflammatory Cytokines and Stress Hormones

Aromatase is not just regulated by classic reproductive hormones. Inflammatory molecules play a substantial role, especially in peripheral tissues. Cytokines like interleukin-6 (IL-6) and tumor necrosis factor alpha (TNF-alpha) stimulate aromatase expression in tissues including fat and breast tissue.¹¹ Prostaglandin E2, another inflammation-related signaling molecule, may also drive aromatase activity in certain tissues. TNF-alpha specifically activates an aromatase promoter in adipose stromal cells through a signaling pathway that requires glucocorticoids to be present.¹²

Glucocorticoids themselves, the stress hormones your adrenal glands release, can induce aromatase expression in the brain. Research on hypothalamic neurons showed that dexamethasone, a synthetic glucocorticoid, activated the brain-specific aromatase promoter.¹³ This may be one reason brain aromatase serves a protective role against neural damage: when the brain is under stress, glucocorticoids ramp up local estrogen production as part of the repair response. Brain aromatase appears to protect neurons by slowing cell death pathways and potentially supporting the birth of new cells after injury.¹⁴

The practical message here is mixed. Chronic low-grade inflammation, like the kind associated with obesity or a sedentary lifestyle, can drive aromatase in fat tissue in ways that contribute to estrogen-driven disease risk. Meanwhile, acute stress responses in the brain appear to use aromatase for protective purposes. You do not want to pursue chronic inflammation as an aromatase-boosting strategy. But understanding that the body uses inflammation and stress signals to regulate local estrogen production helps explain why the relationship between aromatase and health is so context-dependent.

The Gut Microbiome and Estrogen Recycling

Aromatase creates estrogen, but your gut bacteria influence how much of that estrogen stays in circulation. Certain gut microbes produce an enzyme called beta-glucuronidase, which reverses the liver’s deactivation of estrogen. Normally, the liver tags estrogen molecules for excretion. Beta-glucuronidase strips off those tags, allowing estrogen to be reabsorbed into the bloodstream.¹⁵ This process does not change aromatase activity directly, but it amplifies the effect of whatever estrogen aromatase produces by keeping it in circulation longer.

A diverse gut microbiome that includes these beta-glucuronidase-producing bacteria can effectively raise your functional estrogen levels even without any change in aromatase itself. Fiber-rich diets that support microbial diversity may indirectly support estrogen bioavailability through this mechanism. Conversely, broad-spectrum antibiotic use, which can wipe out gut flora, has been associated with shifts in estrogen metabolism. This is an area where the science is still developing, but it represents a genuinely distinct pathway from aromatase that nonetheless affects the same endpoint: how much active estrogen your body has access to.

Supplements and Herbs That Actually Suppress Aromatase

This is where many people get tripped up. A number of plant compounds marketed for “hormonal balance” or even “estrogen support” turn out to be aromatase inhibitors, working against the very goal of increasing aromatase activity. Phytoestrogens as a class tend to decrease aromatase gene expression, directly inhibit the aromatase enzyme, or both.¹⁶

Hops and licorice, two botanical ingredients common in supplements and beverages, inhibited aromatase in a dose-dependent manner in research using postmenopausal breast tissue. One compound from hops, 8-prenylnaringenin, inhibited aromatase with potency approaching that of pharmaceutical aromatase inhibitors like letrozole.¹⁷ If you are drinking hops-heavy craft beer or taking licorice root supplements thinking they will boost your estrogen through aromatase, the evidence points in the opposite direction.

Soy isoflavones, resveratrol from grapes, and various flavonoids found in fruits and vegetables also tend to act as aromatase inhibitors at the doses studied. Phytoestrogens can bind to estrogen receptors and mimic estrogen weakly, which is why they are sometimes called “plant estrogens.” But mimicking estrogen at the receptor is a completely different mechanism from increasing aromatase activity. In fact, these compounds may reduce the body’s own estrogen production while providing a much weaker substitute. Anyone genuinely trying to raise aromatase output should be cautious about high-dose phytoestrogen supplements.

Alcohol Promotes Aromatization, but at a Steep Cost

Chronic heavy alcohol consumption can increase aromatization of androgens to estrogens, at least in the liver. A review of the evidence found that heavy alcohol intake in male rats led to increased aromatization in liver tissue, and in ovariectomized rats, only heavy chronic intake raised plasma estradiol and uterine weight.¹⁸ The effect required substantial, sustained drinking, not casual or moderate intake.

This is obviously not a recommended strategy. The liver damage, metabolic disruption, and cancer risk that come with chronic heavy drinking far outweigh any aromatase-related benefit. But it does explain a clinical observation: men with alcoholic liver disease frequently develop gynecomastia and other signs of estrogen excess. Enhanced aromatization is part of that picture, alongside reduced estrogen clearance by a damaged liver.

Environmental Chemicals and Unintentional Aromatase Enhancement

Some synthetic chemicals in the environment can increase aromatase expression or activity. Endocrine-disrupting chemicals from plastics, pesticides, and industrial compounds have been shown to up-regulate aromatase mRNA, boost aromatase activity, and increase estradiol production in human breast cells.¹⁹ Environmental chemicals can modify aromatase expression in various tissues, shifting the androgen-to-estrogen ratio.²⁰

This is not a lever you want to pull deliberately. Endocrine disruptor exposure is associated with increased cancer risk and reproductive dysfunction, not therapeutic benefit. But it is worth knowing about because it helps explain why some people have unexpectedly high aromatase activity without obvious lifestyle causes. Reducing exposure to known endocrine disruptors, through choices like avoiding certain plastics and filtering drinking water, is generally good practice regardless of your aromatase goals.

Zinc Deficiency Changes Aromatase in Unexpected Ways

Zinc’s relationship with aromatase is counterintuitive. In rats fed a zinc-deficient diet, the liver actually converted more testosterone into estradiol, meaning aromatase activity in the liver went up. At the same time, circulating testosterone and estradiol levels both dropped, along with luteinizing hormone.²¹ The picture was one of overall hormonal disruption: more aromatization per unit of testosterone, but less testosterone to work with and lower hormones across the board.

This means zinc deficiency is not a useful way to boost aromatase. The net effect is worse hormonal function, not better. Adequate zinc intake supports normal steroid metabolism, and that is the practical takeaway. People with marginal zinc status, common among vegetarians, older adults, and those with digestive conditions, may benefit from ensuring they meet dietary zinc requirements.

When Aromatase Activity Becomes Too High

More aromatase is not categorically good. Aromatase excess syndrome, a genetic condition caused by gain-of-function mutations in the aromatase gene, results in estrogen overproduction that causes breast tissue development in boys before puberty, accelerated bone maturation, and shorter adult height.²² Even without a genetic mutation, conditions like obesity, aging, liver disease, and thyroid overactivity can enhance aromatization enough to cause gynecomastia and other signs of estrogen excess.⁵

In the brain and cardiovascular system, aromatase appears to play a protective role. Research on mice found that cerebrovascular aromatase contributes to blood vessel function, and that aromatase inhibitors used clinically may have cardiovascular consequences in both sexes.²³ This is one reason breast cancer patients on aromatase inhibitor drugs sometimes experience cardiovascular and bone-density side effects: suppressing aromatase body-wide removes estrogen from tissues that rely on it.

The bottom line for anyone trying to increase aromatase activity naturally is that tissue context matters enormously. Aromatase in muscle supporting local repair is different from aromatase in fat tissue driving systemic estrogen excess. The lifestyle factors most likely to support healthy aromatase function, adequate dietary fat, regular exercise, stable insulin signaling, and sufficient micronutrient intake, are the same factors that support metabolic health generally. Approaches that push aromatase activity beyond what normal physiology calls for, like chronic heavy drinking or deliberate weight gain, carry risks that make them self-defeating.