Hair loss in women can be deeply distressing, affecting confidence, identity, and overall well‑being. While many factors contribute to female hair thinning, hormonal imbalance is one of the most common causes. Understanding which hormones influence hair loss — especially the role of DHT — can help women make informed decisions about treatment.

This guide explains what hormone causes women’s hair loss, how DHT affects the hair growth cycle, and what you can do to manage hormonal hair thinning effectively.

The Key Hormone Behind Women’s Hair Loss: DHT (Dihydrotestosterone)

The primary hormone responsible for women’s hair loss is DHT (dihydrotestosterone) — a potent derivative of testosterone. Although testosterone is typically associated with men, women also produce small amounts in the ovaries and adrenal glands. Some of this testosterone naturally converts into DHT.

How DHT Causes Hair Thinning in Women

DHT binds to androgen receptors in the scalp and triggers a process known as follicle miniaturisation. Over time:

• hair follicles shrink
• the growth phase becomes shorter
• strands grow back thinner and weaker
• follicles eventually become dormant

This pattern of gradual thinning is known as female pattern baldness or androgenetic alopecia, the most common form of long‑term hair loss in women.

How DHT Causes Female Pattern Baldness

Women with female pattern hair loss often have increased sensitivity to DHT, even when hormone levels are within a normal range. This sensitivity leads to:

• reduced follicle size
• shorter, finer regrowth
• widening parting
• reduced density on the crown
• slow, progressive thinning rather than sudden shedding

Unlike male pattern baldness, women rarely experience complete bald patches — instead, the hair becomes noticeably finer and less dense over time.

Other Hormones That Influence Women’s Hair Loss

While DHT is the main hormone involved, several other hormonal changes can contribute to thinning hair.

Oestrogen

Oestrogen supports healthy hair growth by prolonging the anagen (growth) phase.
When oestrogen levels decline — especially during perimenopause and menopause — many women experience increased shedding and reduced density.

Progesterone

Progesterone helps counterbalance testosterone.
Low progesterone levels allow more testosterone to convert into DHT, increasing the risk of hormonal hair thinning.

Cortisol (Stress Hormone)

Chronic stress elevates cortisol, which disrupts the hair growth cycle and can trigger excessive shedding (telogen effluvium).

Thyroid Hormones

Both hypothyroidism and hyperthyroidism can cause diffuse thinning, dryness, and weakened hair structure.

DHT and Hair Loss in Women: Treatment Options

Managing hormonal hair loss often requires a combination of targeted treatments and lifestyle support.

Minoxidil

A clinically proven topical treatment that stimulates follicles and prolongs the growth phase.

Antiandrogen Medications

Medications such as spironolactone or finasteride (in select cases) help reduce DHT activity and slow female pattern hair loss.

Hormone Replacement Therapy (HRT)

For postmenopausal women, HRT may help restore oestrogen and progesterone balance, supporting healthier hair growth.

Nutritional & Lifestyle Support

• balanced diet rich in iron, zinc, and vitamin D
• stress reduction techniques
• addressing underlying hormonal imbalances
• scalp health optimisation

These can all improve hair density and overall scalp condition.

When to See a Trichologist

You may benefit from professional assessment if you notice:

• widening parting
• reduced density on the crown
• persistent shedding lasting more than 3 months
• family history of female pattern hair loss
• changes linked to menopause, stress, or illness

A trichologist can provide a personalised diagnosis, identify hormonal triggers, and recommend evidence‑based treatment options tailored to your needs.

Final Thoughts

The hormone most strongly linked to women’s hair loss is DHT, but changes in oestrogen, progesterone, cortisol, and thyroid hormones can also play a significant role. Understanding how these hormones affect the hair growth cycle empowers women to seek the right treatments and take proactive steps toward restoring thicker, healthier hair.

If you’re experiencing ongoing hair thinning, a professional consultation can help you identify the cause and begin an effective, personalised treatment plan.