Hair loss in women: should you really be worried?

Finding hair on your pillow, in your brush, or in the shower drain is one of the most common concerns brought to us in the pharmacy. The good news is that not all hair loss is the same, and a large portion of it is temporary.

Before panicking or stocking up on supplements, it's important to understand what type of hair loss you're experiencing, because the answer — whether to wait it out, correct a deficiency, or consult a professional — varies depending on the underlying mechanism.

Losing hair is neither a sign of poor hygiene nor lack of care: it is almost always a signal from the body that we can learn to read.

Losing hair is also normal

On average, we lose between 50 and 100 hairs per day, and even more on shampoo days. This is the natural renewal process of hair, which alternates between growth and rest phases before falling out. Hair loss becomes a concern when it significantly intensifies, lasts over time, or when hair density visibly decreases on the top of the head. This nuance—sudden, temporary hair loss versus slow, lasting thinning—guides everything else.

Telogen effluvium, reactive hair loss

This is the most common form of sudden and diffuse hair loss. An event causes a large number of hairs to enter the resting phase simultaneously, after which they all fall out at the same time. Classic triggers include childbirth (the well-known postpartum hair loss), but also significant stress, high fever, surgery, restrictive diets, thyroid disorders, or deficiencies. A confusing characteristic is that hair loss generally occurs two to three months after the event, making the connection not always obvious. Its major advantage is that it is almost always self-resolving: once the trigger factor has passed or been corrected, hair regrows, usually within a few months.

Androgenetic alopecia, more progressive

Conversely, female pattern hair loss (androgenetic alopecia) develops slowly. It is not about spectacular hair loss but rather a thinning and rarefaction of hair on the top of the head: a widening part is the most telling sign, with the frontal hairline most often preserved. It is common and increases with age: it is estimated that about one in four women is affected to some degree around age forty, and more than one in two after 70. Unlike effluvium, it does not resolve spontaneously: it requires management to stabilize it.

What has really been proven

Topical minoxidil is the best-documented treatment for female pattern hair loss, and the only one approved for this indication. Controlled trials show that it increases the number and diameter of hairs, with about 40% of women noticing a clear improvement—which also means it doesn't work for everyone, and it requires patience (several months) and regularity, as the effect fades upon discontinuation. A second strong lever: correcting a genuinely confirmed deficiency. An iron deficiency (low ferritin) or vitamin D deficiency can contribute to hair loss, and its correction is useful—but only if documented by a blood test, as blind supplementation is pointless and excess iron is not harmless.

What doesn't work much, and when to consult

Conversely, many "anti-hair loss" products sold without a diagnosis have weak evidence. Multivitamin supplements are only demonstrably useful if they address an existing deficiency: for a woman with normal blood work, expecting regrowth is illusory. The best approach remains diagnosis. Consult a doctor or dermatologist if hair loss is sudden and massive, if it lasts beyond six months, if it is accompanied by patches, redness, itching, or hormonal signs (irregular cycles, unusual hair growth). A simple blood test (iron, ferritin, thyroid, vitamin D) often provides sufficient guidance for action.

The Paradermia approach

Our pharmacist's conviction: start by understanding before treating. We don't offer the same support for postpartum hair loss, which primarily requires time and a soothed scalp, as we do for early androgenetic alopecia, which warrants medical advice and long-term treatment. Our role is to help you identify the correct scenario, support the hair fiber and scalp during the regrowth phase, and guide you toward a consultation when the context calls for it — without ever making you feel guilty or selling you a miracle promise.