You haven't changed your routine. Yet your hair looks thinner. As you approach menopause, oestrogen falls. That matters for hair because the follicle has oestrogen receptors of its own — it's a direct target for the hormone, not a bystander (Ohnemus et al., *Endocrine Reviews*, 2006). Oestrogen helps keep follicles in their growing phase for longer. When that support weakens, more follicles leave the growing phase early. Female-pattern hair loss also becomes more common after menopause: a widening parting, gradual thinning across the top. Heredity plays a part too. It doesn't mean every woman will lose her hair. It means your hormonal history is relevant — and that it isn't the only thing to check.

Before periods stop, they often get heavier and less predictable. Heavy periods drain iron, and low iron is a well-established cause of shedding. Ferritin is the marker of your iron stores. A lab may call a low-normal result "fine"; hair-loss specialists have long recommended a higher threshold for women with shedding (Trost et al., *Journal of the American Academy of Dermatology*, 2006). This is why one more product on the bathroom shelf can miss what you actually need. If iron is the problem, a serum won't fix it — your GP will. Ask for a ferritin test. Say the words "hair loss" when you do.

When a hair change and the menopause arrive together, it's natural to blame one on the other. But thyroid problems are one of the causes a clinician will look at alongside iron — and they are more common in women in midlife. Straw-like texture and eyebrows thinning at the outer ends are the classic signs. The useful question isn't "Is this my age?" It's "What is contributing to this, and what would address it?" Getting that answer from your GP is free. It also explains why the last three things you bought didn't work.

Gummies, then a thickening shampoo, maybe minoxidil. And the parting is still there. **Biotin.** A deficiency can affect hair, but it's rare. Without one, the evidence that biotin does anything is thin (Patel et al., *Skin Appendage Disorders*, 2017). **Minoxidil.** It can help female-pattern hair loss. It also needs six to twelve months to judge, can cause early shedding and irritation, and stops working when you stop. **Thickening shampoos.** They coat the strand. Fuller-looking hair for a wash or two is not the same as fuller hair. **Other supplements.** More ingredients don't mean more density. None of these are scams. Most of them are simply aimed at the hair — and the hair you can touch is already dead. The follicle underneath is what decides what grows next.

If the follicle is the target, two questions decide whether a serum is worth your money. **What's in it?** *Peptides* are short chains of amino acids that act as messengers — skin cells recognise them and respond. *PDRN* is a fragment of DNA, originally from salmon, used in regenerative medicine for tissue repair and now studied for hair, mostly as injections around the follicle. The research on topical use is younger, so the honest claim is this: these are the first ingredients that talk to the cells that make hair, rather than coating the hair itself. **How does it get there?** Rub a serum in with your fingertips and most of it coats the lengths. A brush applicator that parts the hair and places the formula on the scalp fixes the obvious problem. Micro-spicules that create temporary channels on contact go one step further — you feel them as a brief tingling. Those are the two criteria. Ingredients that signal the follicle, and an applicator that reaches it. **Meet KLYVER** KLYVER is a PDRN-and-peptide serum in a 38-bristle brush that puts the formula on your scalp, with mineral micro-spicules to help it in. Two minutes a day. No needles. It's a cosmetic scalp-care step, not a treatment. If your GP is managing a diagnosed cause, keep that separate. And give it a full hair cycle — photograph your parting on day one so you can judge it honestly.