Written by: Adam Perlman, MD, MPH, FACP
Chief Medical Officer, Pendulum Therapeutics | Former Director of Integrative Health and Wellbeing, Mayo Clinic in Florida
If you are noticing more hair in the shower drain, a widening part, or less fullness at your crown, you likely are not imagining it. Hair thinning can become more noticeable during the perimenopause years, but it is not always caused by perimenopause alone.
Hormonal changes may play a role, but so can genetics, stress, thyroid conditions, iron deficiency, certain medications, illness, and significant weight changes. Although female-pattern hair loss becomes more common with age, the good news is that identifying the pattern and addressing treatable contributors can make a meaningful difference.
What Is Perimenopause?
Perimenopause is the transition leading up to menopause, when ovarian hormone production becomes less predictable and estrogen levels fluctuate. It can last for several years. Menopause is generally identified after 12 months without a period, when hormonal contraception or another cause does not explain the absence of bleeding.
For many people, perimenopause begins in their 40s, although changes may begin earlier. A change in menstrual cycles is often one of the first signs: periods may become shorter or longer, lighter or heavier, closer together or farther apart, and may eventually be skipped.
In otherwise healthy people aged 45 or older with typical symptoms, perimenopause is usually diagnosed from symptoms and menstrual changes rather than hormone blood tests. Testing may be appropriate at younger ages or when another diagnosis is suspected.
Common Signs
Perimenopause can look different from person to person. Common experiences include:
- Changes in menstrual timing or flow
- Hot flashes and night sweats
- Sleep disruption
- Mood changes
- Difficulty concentrating or "brain fog"
- Vaginal dryness or changes in sexual comfort
- Fatigue
Some people also notice increased shedding or hair thinning during this life stage. However, hair loss has many possible causes, so it is important not to assume that hormones are the only explanation. Changes in menstrual cycles and vasomotor symptoms, such as hot flashes and night sweats, are particularly useful in recognizing the menopausal transition.
Why Hair May Thin
Hair follicles cycle through growth, transition, and resting phases before hairs are shed. Female-pattern hair loss involves progressive miniaturization: affected follicles produce finer, shorter hairs. Genetics and aging are important contributors.
Hormonal changes may also play a role, but the exact effects of estrogen and androgens on female-pattern hair loss are not fully understood. Most affected women have normal androgen levels. The condition becomes more common after menopause, but thinning during perimenopause cannot automatically be attributed to falling estrogen or a simple hormone imbalance.
Significant emotional stress, major illness, surgery, and substantial weight loss can trigger telogen effluvium, a form of increased shedding that often becomes noticeable a few months after the trigger. It can occur alongside female-pattern hair loss.
Is It Perimenopause — or Something Else?
Hair thinning linked to female-pattern hair loss is often gradual. Many people notice a widening center part, thinning at the crown, or an overall reduction in hair density rather than sudden bald patches.
Other possible contributors include:
- Thyroid disease
- Iron deficiency
- A new medication or supplement
- Significant illness, surgery, or emotional stress
- Rapid weight loss or inadequate protein intake
- Inflammatory or autoimmune scalp conditions
- Other forms of hair loss, including telogen effluvium or alopecia areata
Talk with a clinician or dermatologist if you have sudden or dramatic shedding, patchy hair loss, scalp pain, redness, scaling, scarring, or symptoms such as marked fatigue, palpitations, temperature intolerance, or unexplained weight change. A dermatologist can help distinguish female-pattern hair loss from other causes and recommend the appropriate evaluation.
What Can Help?
There is no overnight fix, but several evidence-based steps can help protect hair density and address underlying causes.
- Get the pattern evaluated. A clinician may recommend targeted testing — such as thyroid function, a complete blood count, and ferritin to assess iron stores — based on your symptoms, medical history, menstrual bleeding, diet, medications, and hair-loss pattern. Not everyone needs the same tests.
- Consider topical minoxidil for female-pattern hair loss. U.S. FDA-approved options for women include 2% solution, generally applied twice daily, and 5% foam, generally applied once daily. Follow the product label and your clinician's advice. Results vary; a clinician may assess benefit over six to 12 months. The cited U.S. labels advise stopping and asking a doctor if there is no regrowth after four months with 2% solution or six months with 5% foam.
- Know what to expect. Temporary increased shedding can occur early in treatment, and continued use is needed to maintain benefits. Scalp irritation and unwanted facial hair can occur. Avoid minoxidil during pregnancy, while trying to conceive, or while breastfeeding. Pregnancy is still possible during perimenopause.
- Address nutritional gaps. Adequate protein intake matters for normal hair growth. If testing identifies iron deficiency or another nutrient deficiency, correcting it with a clinician's guidance may help when that deficiency contributes to hair loss. Taking extra nutrients when levels are normal is not a proven way to regrow hair.
- Prioritize sleep and stress support. Significant stress can trigger shedding. Addressing hot flashes, night sweats, sleep quality, and stress can support well-being, and should complement a treatment plan based on the cause of hair loss.
Where Hormone Therapy Fits
Systemic menopausal hormone therapy is effective for bothersome hot flashes and night sweats and may improve sleep when those symptoms disrupt it. Low-dose vaginal estrogen is an option when vaginal or urinary symptoms are the main concern. The choice depends on symptoms, health history, and personal risks.
Hormone therapy is not an established treatment for female-pattern hair loss and should not be started solely to regrow hair. Its benefit for scalp hair remains uncertain. If you are considering it for menopause symptoms, discuss the risks, benefits, and treatment goals with a qualified clinician.
Where Supplements Fit
Evidence for hair supplements is limited and mixed. Some products have shown benefits in small studies, but that does not establish a reliable treatment for female-pattern hair loss or thinning specifically caused by perimenopause. Be cautious with products that promise dramatic regrowth or imply that "hormone balancing," microbiome support, or blood-sugar support alone will restore hair density; these claims should not replace an evaluation and a treatment plan based on the cause of hair loss.
A practical approach is to focus on the basics: sufficient protein and calories, a varied nutrient-dense diet, and correction of documented deficiencies. Before taking a hair-focused supplement, review the ingredients with a clinician or pharmacist, especially if you take prescription medications or have a thyroid condition. Biotin can interfere with some blood tests, including thyroid tests, so tell your clinician and laboratory if you take it.
Taking the Next Step
Hair thinning during the perimenopause years is common and can be emotionally difficult, but it is not something you simply have to accept. A clear diagnosis, an evaluation for treatable contributors, and an evidence-based treatment plan can help you protect hair density and feel more in control. Treatment may slow progression or produce some regrowth, but results vary and complete restoration is not guaranteed.
References
Sources checked October 14, 2026. Bracketed numbers in the article refer to the sources below.
- American Academy of Dermatology. Thinning hair and hair loss: Could it be female pattern hair loss?
- NICE. Menopause: identification and management (NG23). Recommendations, section 1.3.
- NHS. Symptoms of menopause and perimenopause.
- British Association of Dermatologists. Hair loss female pattern (androgenetic alopecia).
- DermNet. Female pattern hair loss.
- American Academy of Dermatology. Do you have hair loss or hair shedding?
- American Academy of Dermatology. Hair loss: Diagnosis and treatment.
- American Academy of Dermatology. Hair loss: Who gets and causes.
- DailyMed. WOMENS ROGAINE UNSCENTED — minoxidil aerosol, foam (5%). U.S. drug label.
- DailyMed. UP AND UP HAIR REGROWTH TREATMENT FOR WOMEN — minoxidil solution (2%). U.S. drug label.
- NHS. Things you can do to help menopause and perimenopause symptoms.
- The Menopause Society. Hormone Therapy.
- National Institutes of Health, Office of Dietary Supplements. Biotin: Fact Sheet for Health Professionals.
- DermNet. Diffuse alopecia. Diagnosis: Blood tests.
- Kamp E, et al. Menopause, skin and common dermatoses. Part 1: hair disorders. Clinical and Experimental Dermatology. 2022;47(12):2110–2116.
- Mayo Clinic. Perimenopause: Symptoms and causes.
This content is for educational purposes only and is not a substitute for individualized medical advice. It is not intended to diagnose, treat, cure, or prevent any disease.
