Biotin gummies, rosemary oil, the shampoo in the clinical-looking bottle, a serum that cost more than dinner out. If you have used several at once and still watched your part widen, it is easy to blame yourself, or the brand.

There is a simpler explanation. New hair is made in the follicle, several layers below the skin you can see. The outer layer of your scalp exists to keep things out, and it makes no exception for expensive ingredients.

We call it the Surface Stall: a well-made formula that sits on top of the scalp, dries and rinses away before much of it gets anywhere near the root.*

Meanwhile the effort of hiding it keeps growing: fibres and root sprays, a carefully chosen parting, the angle you stand at in photos. Most fixes fall into one of two traps. They never get below the surface, or they only work for as long as you keep paying for them.

Tressora was designed to get around both.

Tressora pairs a peptide serum with a pen-sized infusion device. Its clear treatment head carries 20 fine tips set to a fixed 0.5 mm, and it is pressed straight down onto the scalp, never rolled.

Each press opens a pattern of tiny, short-lived channels in the outer layer. The serum, built around a copper tripeptide, is released at the same moment and follows those channels down towards the follicles.*

The kind of ingredients you were already hoping would work, with a route that finally reaches the root.

A leave-in serum used morning and night adds up to roughly 168 applications over twelve weeks. Miss a handful and you start wondering whether any of it counted.

Tressora is a 12-week course of six sessions, one every two weeks. Each takes about five minutes, so the whole course asks for around half an hour of your time.

That matters more than it sounds. Daily routines rarely end because you stop caring. They end because of a late night, a work trip or a week looking after someone else. The bottle drifts to the back of the cabinet and the thinning carries on.

Let us be upfront: a device with fresh treatment heads and a peptide serum costs more than a bottle of shampoo.

But if you have spent the past year buying one product after another, the price is not really the worry. The worry is paying again and ending up right where you started.

The kit holds everything the course needs: the device, six serum vials and six sealed treatment heads. From day one you can see how many sessions are left and exactly what the course costs, because nothing else needs buying along the way.