What is Estradiol?
Estradiol is a hormone that influences multiple organ systems, including the reproductive, cardiovascular, skeletal, and central nervous system.
In women, estradiol is produced by the ovaries. It regulates ovulation, supports the uterine lining, and drives the menstrual cycle. As women enter perimenopause, estradiol levels fluctuate widely, which can lead to symptoms including irregular or absent menstrual cycles, hot flashes, sleep disruption, vaginal dryness, and reduced bone density.
Why Does Estradiol Matter?
- Regulates the menstrual cycle by responding to brain signals that controls ovulation timing
- Supports fertility in women by triggering ovulation and thickening the uterine lining for implantation
- Maintains bone health and strength in men and women by regulating the bone remodeling process
- Supports cardiovascular function in men and women by helping blood vessels stay relaxed and flexible
- Supports cellular energy production in men and women by helping mitochondria function efficiently
- Supports brain health including cognition and mood regulation
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How to Interpret Estradiol
In women, estradiol fluctuates throughout the menstrual cycle, and a single blood test only captures your level on the day it was taken. In women with regular cycles, estradiol is relatively low at the start of the cycle, rises as ovarian follicles develop, peaks just before ovulation, then briefly declines before rising again during the luteal phase.
For this reason, physicians interpret estradiol levels in the context of where you are in your cycle. If cycles are irregular or cycle timing is unclear, clinicians evaluate estradiol alongside other hormones such as follicle-stimulating hormone (FSH) and progesterone, as well as symptoms and cycle history.
*During perimenopause, estradiol levels may become more erratic as ovarian hormone production becomes less consistent
(Ranges may vary slightly by lab)
Standard reference ranges represent the middle 95% of healthy individuals but don’t necessarily reflect levels associated with longevity. Optimal ranges are derived from clinical guidelines, peer-reviewed research, and real-world outcomes data, with an emphasis on levels associated with peak functioning and reduced disease risk.
Benefits of Optimizing Estradiol
- Improved cardiovascular health and optimal blood pressure
- Lower risk of osteoporosis and bone fractures
- Improved muscle protein production and muscle mass maintenance
- Healthier metabolism
- Better insulin sensitivity
- Improved sleep quality
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Low Estradiol Levels in Women
Estradiol naturally fluctuates throughout the menstrual cycle, so a single low value does not diagnose perimenopause. Persistently low estrogen levels may help confirm menopause or premature ovarian insufficiency.
Symptoms:
- Night sweats and hot flashes
- Vaginal dryness
- Thinning hair
- Mood swings
- Insomnia
- Fatigue
- Trouble concentrating
- Irregular or absent periods
Causes:
- Perimenopause or menopause
- Premature Ovarian Insufficiency (POI)
- Low body weight
- Excessive exercise
- Autoimmune diseases
- Turner syndrome
- Pituitary gland issues
Healthspan Impacts:
- Accelerated bone loss and increased fracture risk
- Increased abdominal fat and insulin resistance
- Higher long-term cardiovascular risk
- Cognitive decline over time
- Reduced muscle mass and physical resilience
Low Estradiol Levels in Men
When estradiol levels are low in men, it is often due to low testosterone or over-suppression of estrogen during testosterone therapy.
Symptoms:
- Reduced libido
- Erectile dysfunction
- Joint discomfort
- Increased belly fat
- Low mood
- Fatigue
- Reduced bone density
Causes:
- Low testosterone
- Aging
- Metabolic issues
- Aromatase inhibitor use while on testosterone therapy
- Chronic illness or liver disease
- Low body fat
- Excessive exercise
Healthspan Impacts:
High Estradiol Levels in Women
Elevated estradiol levels in women may reflect typical cycle fluctuations. In some cases, they may suggest a hormonal imbalance or impaired estrogen metabolism.
Symptoms:
- Irregular or heavy periods
- Weight gain
- Severe PMS
- Mood swings
- Fatigue
- Lower libido
- Bloating / fluid retention
- Tender or fibrocystic breasts
Causes:
- Hormonal imbalances
- Certain medications (including birth control and hormone replacement therapy)
- Obesity
- Polycystic ovary syndrome (PCOS)
- Endometriosis
- Fibroids
- Estrogen-producing tumors (rare)
Healthspan Impacts:
- Increased risk of estrogen-sensitive breast, uterine, and ovarian cancers in certain contexts 3
- Higher risk of blood clots3
High Estradiol Levels in Men
In men, elevated estradiol often results from increased conversion of testosterone to estrogen, particularly with higher body fat or during testosterone therapy.
Symptoms:
Causes:
- Aging
- Obesity
- Liver disease
- Testosterone therapy without proper monitoring
- Certain medications (antidepressants, antifungals)
- Testicular or adrenal issues
Healthspan Impacts:
- Higher risk of erectile dysfunction and infertility4
How Hone Treats Out-of-Range Estradiol
Your Hone physician will evaluate E2 levels alongside your other biomarkers, symptoms, and overall health. From there, we can map out a treatment plan that addresses the underlying issue.
- Estradiol patch or gel (for women) – to treat low estradiol levels
- Bi-est cream (for women) – to treat low estradiol levels
- Estradiol vaginal cream or gel (for women) – to treat vaginal dryness and genitourinary symptoms of menopause
- Vaginal estrogen suppositories (for women) – to treat vaginal dryness and genitourinary symptoms of menopause
- Testosterone replacement therapy (TRT) (for men and women) – when clinically indicated to restore hormonal balance
- Aromatase inhibitors (for men) – to reduce the conversion of testosterone to estradiol when clinically indicated and carefully monitored
- DHEA (dehydroepiandrosterone) – in select clinical contexts and under medical supervision
- Boron5
- Vitamin D6
- Omega-3 fatty acids7
- Probiotics8
- Magnesium
- Reduce alcohol intake
- Maintain a healthy weight
- Consume more phytoestrogen-rich foods such as tofu, flaxseeds, legumes, and sesame seeds9
- Manage stress
- Get 7-8 hours of quality sleep per night
- Incorporate resistance training10
Cauley J. A. (2015). Estrogen and bone health in men and women. Steroids.
↑Ali, N., et al. (2023). The Role of Estrogen Therapy as a Protective Factor for Alzheimer’s Disease and Dementia in Postmenopausal Women: A Comprehensive Review of the Literature. Cureus.
↑Abou-Ismail, M.Y., Sridhar, D. C., & Nayak, L. (2020). Estrogen and Thrombosis: A Bench to Bedside Review. Thrombosis Research.
↑Chen, H.R., et al. (2020). Estradiol is an independent risk factor for organic erectile dysfunction in eugonadal young men. Asian Journal of Andrology.
↑Pizzorno, L. (2015). Nothing Boring About Boron. Integrative Medicine: A Clinician’s Journal.
↑Dai, X., et al. (2025). Estradiol and vitamin D exert a synergistic effect on preventing osteoporosis via the miR-351-5p/IRS1 axis and mTOR/NFκB signaling pathway. Scientific Reports.
↑Al-Shaer, A.H., et al. (2019). Assessing the effect of omega-3 fatty acid combined with vitamin D3 versus vitamin D3 alone on estradiol levels: A randomized, placebo-controlled trial in females with vitamin D deficiency. Clinical Pharmacology: Advances and Applications.
↑Bolgova, O., Shypilova, I., & Mavrych, V. (2025). Natural strategies to optimize estrogen levels in aging women: Mini review. Frontiers in Aging.
↑Bolgova, O., Shypilova, I., & Mavrych, V. (2025). Natural strategies to optimize estrogen levels in aging women: Mini review. Frontiers in Aging.
↑Razzak, Z. A., Khan, A. A., & Farooqui, S. I. (2019). Effect of aerobic and anaerobic exercise on estrogen level, fat mass, and muscle mass among postmenopausal osteoporotic females. International Journal of Health Sciences.
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Reviewed for Accuracy by Our Medical Review Board
This biomarker information has been reviewed by a member of Hone’s medical review board. As part of the medical review team, physicians fact-check this content against the latest research and their own experience treating their patients.
Ashley Winter, M.D., is a board-certified urogynecologist trained at Weill Cornell and Cleveland Clinic. She specializes in female and male sexual dysfunction, urinary issues, genital pain, and hormone therapy.
James Staheli, D.O., is the Medical Director for Broad Health, Hone Health’s affiliated medical practice and a family medicine doctor in Atlanta, Georgia.
