Hair thinning in midlife hits hard, partly because it's so visible and so little discussed. Here's what's usually going on — and why guessing is the wrong approach.

The hormonal picture. Oestrogen helps keep hair in its growing phase. As it declines in perimenopause and menopause, and the relative influence of androgens (like testosterone) rises, some women develop thinning in a female pattern — most noticeable at the crown and along the parting, while the hairline usually stays put.

The non-hormonal culprits — check these. Hair is a sensitive barometer of overall health, and several common, fixable issues cause shedding:

• Thyroid problems (both under- and overactive) — very common in women and easily tested
• Low iron / ferritin — especially with heavy perimenopausal periods
• Stress (a few months after a stressful event, hair can shed — called telogen effluvium)
• Rapid weight loss or very low-protein diets

Because these overlap, a GP visit and simple blood tests (thyroid, iron, sometimes others) are the smartest first step.

What supports healthier hair:

• Fix the root cause if tests reveal one (treating low iron or thyroid often brings hair back).
• Eat enough — especially protein. Hair is built from it.
• Be gentle. Reduce heat, tight styles, and harsh treatments while hair is fragile.
• Evidence-based options. Some women benefit from specific topical treatments; a clinician or dermatologist can advise.

The reassuring part. A lot of midlife hair thinning is driven by treatable factors, and even hormonal thinning can often be slowed and supported. Don't suffer in silence — get the simple checks done.

Common questions

Can menopause cause hair loss?

Yes — falling oestrogen and a shift in the androgen balance can thin hair, typically at the crown and parting.

What should I get checked for hair thinning?

Ask your doctor about thyroid function and iron/ferritin first — both are common, treatable causes of shedding in women.

Keep reading: Thyroid or hormones? · Why your skin changes at menopause · Take the free Hormone Quiz