PCOS Symptom Guide

PCOS Hair Loss

Why PCOS causes scalp hair thinning, which treatments are backed by evidence, and how to build an effective strategy to slow loss and encourage regrowth.

Last reviewed: June 25, 2025

H

HerPCOS Editorial Team

Evidence-based health content for women with PCOS

Last reviewed

June 25, 2025

Evidence-based

This content is for general informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider for diagnosis and treatment.

The PCOS-Hair Loss Connection

Hair loss is one of the most distressing — and least talked about — symptoms of PCOS. Approximately 40–70% of women with PCOS experience some degree of scalp hair thinning, medically known as androgenic alopecia or female pattern hair loss.

What makes PCOS-related hair loss particularly confusing is the paradox: the same hormonal imbalance that causes scalp hair to thin also causes excess hair growth on the face and body (hirsutism). This seems contradictory — but different hair follicles respond differently to the same androgens, depending on their location and genetic sensitivity.

The good news: PCOS hair loss is treatable, especially when caught early. Understanding why it happens is the first step to choosing the right treatment approach. If you haven't yet confirmed your hormone levels, our PCOS lab results guide explains which tests to ask for.

Why PCOS Causes Hair Loss

🔬

Elevated Androgens (Testosterone)

Most women with PCOS produce excess androgens. Hair follicles on the scalp are sensitive to testosterone and its more potent derivative DHT, which shrinks them over time — causing hairs to become thinner and shorter with each growth cycle.

⚡

DHT (Dihydrotestosterone)

Testosterone converts to DHT via an enzyme called 5-alpha reductase. DHT binds strongly to hair follicle receptors, shortening the growth phase and eventually causing the follicle to stop producing hair. This is the same mechanism as male-pattern baldness.

📈

Insulin Resistance

High insulin levels stimulate the ovaries to produce more androgens and may also directly sensitize hair follicles to androgen damage. Improving insulin sensitivity often slows hair loss as a side effect.

😰

Cortisol & Stress

Women with PCOS tend to have dysregulated cortisol levels. Chronic stress and high cortisol can trigger telogen effluvium — a type of diffuse shedding — which compounds androgenic hair loss.

🥗

Nutritional Deficiencies

Iron deficiency (common with heavy PCOS periods), low zinc, and inadequate protein can all worsen hair loss independent of androgens. Getting key nutrients tested can reveal treatable contributors.

Medical Treatments

Minoxidil (Rogaine)

First-line

FDA-approved for female hair loss. Applied to the scalp once or twice daily, it prolongs the hair growth phase and increases follicle size. Available OTC. Results take 4–6 months; must be used continuously.

Spironolactone

Prescription

A prescription anti-androgen that blocks testosterone's effect on hair follicles. Often used in PCOS for both hair loss and hirsutism. Not suitable during pregnancy. Requires a doctor's prescription.

Oral Contraceptives

Prescription

Combined pills containing low-androgen progestins (like drospirenone) reduce free testosterone, which can slow androgenic hair loss and reduce hirsutism. Takes 6–12 months to see scalp improvement.

Finasteride / Dutasteride

Off-label

5-alpha reductase inhibitors that block DHT production. Sometimes prescribed off-label for women with PCOS-related hair loss, but require strict contraception due to birth defect risk.

Supplements with Evidence

Saw Palmetto

Supplement

A natural 5-alpha reductase inhibitor that may block DHT. Weaker than finasteride but available OTC. Some positive studies in androgenic alopecia. Generally safe; start at 320 mg/day.

Inositol (Myo-Inositol)

Supplement

Reduces insulin and androgen levels, which indirectly reduces DHT-driven hair loss. Works best as part of an overall PCOS management plan. See our inositol guide for full details.

Zinc

Supplement

Zinc has mild anti-androgen properties and is essential for hair growth. Deficiency worsens hair loss. Test your zinc levels first; supplement at 25–50 mg/day if deficient.

Iron (Ferritin)

Supplement

Low ferritin (stored iron) is a common, treatable cause of hair shedding — even without anaemia. Target a ferritin level above 70 ng/mL for optimal hair growth. Test before supplementing.

Hair Care Tips That Help

While treating the underlying hormonal cause is essential, how you care for your hair day-to-day can reduce additional breakage and protect fragile follicles.

  • ✓Use a gentle, sulphate-free shampoo to reduce scalp irritation and breakage
  • ✓Avoid tight hairstyles (ponytails, buns) that cause traction alopecia on already fragile hair
  • ✓Use a wide-tooth comb on wet hair, starting from the ends upward
  • ✓Limit heat styling — use the lowest effective temperature and always use heat protectant
  • ✓Try scalp massages for 4 minutes daily — a 2019 study showed this can increase hair thickness
  • ✓Eat adequate protein (aim for 1.2–1.6g per kg body weight) — hair is 95% keratin protein
  • ✓Consider a hair-specific supplement like Nutrafol Women's Balance, which contains ashwagandha and tocotrienols

When to See a Doctor

See a dermatologist or your OB-GYN promptly if:

  • ⚠You notice visible scalp through your hair at your part or crown
  • ⚠Hair is shedding in clumps or you see significant hair on your pillow and shower drain
  • ⚠Hair loss started or accelerated suddenly
  • ⚠You have patches of complete hair loss (which may indicate alopecia areata, not PCOS)
  • ⚠You have not yet been evaluated for PCOS despite other symptoms

Frequently Asked Questions

Is PCOS hair loss permanent?+
Not necessarily. Androgenic alopecia from PCOS involves follicle miniaturization, but as long as the follicle is still present, it can potentially respond to treatment. The sooner you act, the better — follicles that have been dormant for many years are harder to reactivate. Early treatment with minoxidil and anti-androgens gives the best outcomes.
Does PCOS cause hair loss on the scalp or hair growth elsewhere?+
Both. PCOS-related androgen excess causes a paradox: androgenic alopecia (scalp hair thinning, especially at the part or crown) alongside hirsutism (excess hair growth on the face, chest, and abdomen). The same hormones cause both patterns simultaneously in different body areas.
How is PCOS hair loss different from normal shedding?+
Normal hair loss is 50–100 strands per day. PCOS-related androgenic alopecia causes gradual thinning rather than sudden shedding — you'll notice your part widening, your scalp becoming more visible, or individual hairs becoming finer. Telogen effluvium (sudden diffuse shedding) can also occur in PCOS, often triggered by stress or hormonal shifts.
What blood tests should I get for PCOS hair loss?+
Ask your doctor to check: total and free testosterone, DHEAS (adrenal androgen), ferritin (iron stores), thyroid panel (TSH, Free T4), zinc, and vitamin D. These tests help distinguish androgenic alopecia from other treatable causes and guide the right treatment approach.
Can diet help with PCOS hair loss?+
Yes — a low-GI diet that reduces insulin levels indirectly lowers androgen production, which can slow androgenic hair loss. Adequate iron, zinc, and protein from food are also essential. Anti-inflammatory foods (oily fish, berries, leafy greens) may help reduce the inflammatory component of PCOS that contributes to follicle damage.
Will my hair grow back after treating PCOS?+
With effective treatment (controlling androgens, using minoxidil), many women experience slowing or halting of hair loss, and some experience regrowth. Results are best when treatment starts early. Regrowth takes at least 6–12 months, and results vary by individual. Set realistic expectations — the goal is often to preserve and strengthen existing hair while stimulating some regrowth.

Medical References

  1. [1]Herskovitz I, Tosti A. (2013). Female Pattern Hair Loss. Int J Endocrinol Metab. 11(4):e9860.
  2. [2]Vexiau P, et al. (2002). Effects of minoxidil versus cyproterone acetate/ethinylestradiol on female androgenetic alopecia: a controlled, randomized, comparative trial. Dermatology. 204(3):232–234.
  3. [3]Kanti V, et al. (2018). Evidence-based (S3) guideline for the treatment of androgenetic alopecia in women. J Dtsch Dermatol Ges. 16(S2):1–29.
  4. [4]Trost LB, et al. (2006). The diagnosis and treatment of iron deficiency and its potential relationship to hair loss. J Am Acad Dermatol. 54(5):824–844.
  5. [5]Fukuyama M, et al. (2022). Efficacy of Scalp Massage in Androgenetic Alopecia. J Clin Med. 11(8):2307.

This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any treatment.

Have Questions About PCOS Hair Loss?

Ask our AI assistant about specific treatments, which supplements to try first, and how to discuss hair loss with your doctor.

Ask the AI Chat Assistant →

Get Our Free PCOS Checklist

Join 1,000+ women managing PCOS. Get our symptom checklist + weekly evidence-based tips delivered to your inbox.

No spam, ever. Unsubscribe anytime.

Related PCOS Guides

PCOS Symptoms GuideInositol for PCOSBest Diet for PCOSInsulin Resistance & PCOS