Estradiol (E2): Its Role in Your Health and Hormone Balance

Estradiol (E2), often simply called estrogen, is the most potent and abundant form of estrogen in the body [1]. While primarily known for its role in female reproductive health, it is also present and important in males [2]. If you are wondering what estradiol (E2) is and how it plays a role in your overall well-being, read this article to learn more.

Estradiol (E2) is a steroid hormone that is the primary female sex hormone, though it is also present in smaller amounts in men [1,2]. It is crucial for the development and maintenance of reproductive tissues and plays a significant role in many other bodily functions [1].

Role and function in the body:

• Female reproductive health: Estradiol (E2) regulates the menstrual cycle, supports uterine health, and is vital for fertility and pregnancy [1,3].
• Bone health: It helps maintain bone density and prevents osteoporosis [1,3].
• Cardiovascular health: Estradiol protects women from cardiovascular disease by increasing regulation of cholesterol and triglyceride metabolism, thereby decreasing the risk of atherosclerotic heart disease [1].
• Brain function: It influences mood, cognitive function, and sleep patterns [1].
• Skin health: Estradiol affects skin elasticity and hydration [3].
• Metabolism: It plays a role in fat distribution and glucose metabolism [1].

Normal estradiol (E2) levels vary significantly based on age, sex, and menopausal status [4]. Optimal estradiol (E2) levels are crucial for various bodily functions. Estradiol (E2) is typically measured in picograms per milliliter (pg/mL) or picomoles per liter (pmol/L) [4]

Group	Typical Estradiol Range	Notes
Male	10 to 50 pg/mL (36.7 to 183.6 pmol/L) [4]	Stable levels compared to females
Female (premenopausal)	30 to 400 pg/mL (110 to 1468.4 pmol/L) [4]	Fluctuates throughout menstrual cycle; lower during menstruation and higher during ovulation [1]
Female (postmenopausal)	0 to 30 pg/mL (0 to 110 pmol/L) [4]	Lower levels due to decreased ovarian function [1]
Children	Very low	Levels remain low before puberty [5]

Factors that affect levels:

• Menstrual cycle phase [1]: Levels naturally rise and fall throughout the cycle, typically lowest during menstruation and peaking around ovulation.
• Pregnancy [5]: Levels increase significantly to support fetal development and maintain the uterine environment.
• Menopause [1]: Levels decline as ovarian function decreases, leading to consistently lower hormone production after menopause.
• Age [4]: Levels change across the lifespan, increasing during puberty, peaking in reproductive years, and gradually declining with age.
• Medications (eg, oral contraceptives, hormone replacement therapy) [5]: Certain medications can raise or regulate hormone activity by introducing synthetic hormones or altering natural production.
• Certain medical conditions (eg, tumors on the ovaries, liver disease) [6]: Some conditions may increase production or impair breakdown, leading to imbalances.

Low Estradiol (E2)

• Menopause or perimenopause: The most common cause, as levels naturally decline with age [7]
• Primary ovarian insufficiency (premature ovarian failure): Ovaries stop functioning before age 40 [7]
• Hypogonadism: Underactive ovaries or testes
• Excessive exercise or extreme dieting: Can disrupt hormone signals from the brain [7]
• Eating disorders (eg, anorexia nervosa): Lack of nutrients needed for hormone production [7]
• Certain medications: Including some antibiotics and corticosteroids [5]
• Genetic conditions (eg, Turner syndrome): Affect ovarian development [7]
• Pituitary gland disorders: Can impair hormone signaling to the ovaries [7]
• Age (nearing or in menopause): Natural decline over time [7]
• History of ovarian surgery or cancer treatments: May damage ovarian function [7]
• Autoimmune diseases: Can attack the ovaries [7]
• Family history of early menopause: May increase risk [7]

High Estradiol (E2)

• Polycystic ovary syndrome (PCOS): Hormonal imbalance affecting estrogen and progesterone [8]
• Estrogen-producing tumors: Including ovarian, adrenal, or testicular tumors [6]
• Liver problems: Impair the body’s ability to break down estrogen [6]
• Obesity: Fat tissue produces estrogen, increasing overall levels [6]
• Hormone replacement therapy (HRT) or high-dose contraceptives: Can elevate hormone levels [6]
• Thyroid disorders: May disrupt hormone balance [6]
• Stress: Elevated cortisol can disrupt hormone balance [6]
• Alcohol consumption: Can increase estrogen and reduce its breakdown [6]
• Exposure to synthetic xenoestrogens: Found in plastics and pesticides [6]
• Family history of certain cancers: May increase risk associated with higher levels [8]

If you think your estradiol (E2) levels may be out of balance, it’s important to talk with a healthcare provider for proper evaluation and guidance. You can also take a proactive approach from home with the Everlywell 360 Full Body Test, which measures 83 biomarkers—including estradiol (E2) and other key hormones—to give you a comprehensive view of your health and help guide your next steps.

Estradiol (E2) symptoms can manifest in various ways, and understanding them can help identify potential imbalances. Both high and low levels can lead to health issues.

Symptoms of Deficiency

System/Area	Symptoms
Reproductive	Irregular or absent periods (amenorrhea), hot flashes, vaginal dryness, decreased libido, infertility, and painful intercourse (dyspareunia) [1,7]
Skeletal	Bone loss (weak or brittle bones) and increased risk of fractures [8]
Mood/Cognitive	Mood swings, irritability, anxiety, depression, difficulty concentrating, and brain fog [1]
Physical	Dry skin, thinning hair, fatigue, sleep disturbances, weight gain, and breast tenderness (in some cases) [7]

Symptoms of Excess

System/Area	Symptoms
Reproductive	Irregular or heavy periods, painful periods, fibrocystic breasts (lumpy, tender breast tissue), fibroids, endometriosis, and reduced fertility (in some cases) [8,6]
Physical	Increased breast tenderness or swelling [6]

Improving or balancing estradiol (E2) levels often involves a multifaceted approach.

Approach	Low Estradiol (E2)	High Estradiol (E2)
Dietary Changes	Include phytoestrogen-rich foods like flax seeds, soy products, and legumes. Add healthy fats from nuts and seeds, and ensure adequate intake of nutrients like vitamin D, magnesium, and boron [7].	Focus on fiber-rich foods like fruits, vegetables, and whole grains to support estrogen elimination. Limit alcohol and processed foods [6].
Medications & Treatment	Hormone replacement therapy (HRT) with estrogen or combined estrogen-progesterone therapy (EPT) is common. Other treatments may address underlying causes [1,7].	May include aromatase inhibitors or treatments targeting underlying conditions such as PCOS or tumors [6].
Lifestyle Changes	Engage in moderate exercise, avoid overtraining, manage stress, maintain a healthy weight, and aim for 7–9 hours of sleep [7].	Exercise regularly to support weight management, reduce stress, prioritize sleep, and limit exposure to environmental toxins like xenoestrogens [6].

Knowing how to test estradiol (E2) is the first step in understanding your levels and what the results mean for your health. An at-home estradiol (E2) test can be a convenient option.

How It’s Tested

• Blood test: The most common method, typically performed when levels are most stable or at a specific point in the cycle [4].
• Saliva and urine tests: May be used to track hormone fluctuations over time [9].

When and Why to Test

• To evaluate reproductive function and fertility issues [4]
• To investigate symptoms of hormonal imbalance (eg, irregular periods, hot flashes, unexplained weight changes, mood swings) [4]
• To monitor hormone therapy [4]
• As part of a comprehensive health assessment [4]

At-Home Testing Options

At-home test kits are available that allow for convenient sample collection (typically blood or saliva) from home, which is then sent to a certified lab for analysis [4].

You do not need to wait for a healthcare provider’s appointment to monitor your estradiol levels. With the Everlywell 360 Full Body Test, you can measure your estradiol (E2) and 80+ other health biomarkers—including vitamins, minerals, hormones, and organ function indicators.

• CLIA-certified labs
• Physician-reviewed results
• Personalized insights and recommendations
• Easy-to-use finger-prick sample collection
• Results in days, no clinic visit required