Hannah LeighHealth Editor · 6 min read · 2 April 2026

The collagen cliff. Nobody warns you. The serums cannot help. Now what.

Between 45 and 55, the structural layer of your skin loses up to thirty per cent of its collagen. I know this because I have been living it, and also because the science is astonishingly clear.

I want to talk about something that happened to my face at 46, because I think it is happening to yours and nobody has had the decency to explain why.

At 32, the lines under my eyes disappeared by lunchtime. At 38, they were still visible at dinner. At 46, they became permanent residents. I adjusted my skincare. I bought better serums. I tried a retinol that cost more than my weekly shop. The lines stayed.

It was not the retinol's fault. It was doing its job perfectly well on the 0.02 millimetres of skin it could reach. The problem was that the actual structural change was happening a hundred times deeper, in a layer no cream, however expensive, can touch.

This is the collagen cliff. And this is a hill I would die on: until you understand it, you will keep spending money on things that work on the wrong layer.

The numbers, plainly.

In 1975, a study published in the British Journal of Dermatology established that skin collagen density falls by about one per cent a year from the age of 25 onwards. One per cent sounds manageable. Over twenty years it is twenty per cent, which sounds less so.

But here is the part nobody mentions at the beauty counter. In 2005, Brincat and colleagues showed that during the five years around menopause, that gentle one-per-cent decline turns into a freefall. Up to thirty per cent of your dermal collagen, gone. In five years. Because oestrogen, the hormone that tells your fibroblasts to keep producing collagen, drops off a cliff of its own.

I find this simultaneously terrifying and reassuring. Terrifying because thirty per cent is a lot of scaffolding to lose. Reassuring because it means the problem is specific, measurable, and not my fault.

Why the bathroom shelf cannot fix it.

Your moisturiser, your serum, your vitamin C, your retinol: they all interact with the stratum corneum. That is the outermost 0.02mm of your skin. It is the cling film. It matters, it needs looking after, and it is not where this problem lives.

Collagen sits at one to two millimetres. In the dermis. That is a hundred times deeper than your most ambitious serum can penetrate.

I spent three years and what I am fairly sure was four figures on topicals before I understood this. The topicals were working. They were just working on the wrong floor of the building.

What actually reaches the structural layer.

Three modalities. Just three. The rest is marketing with lights on.

Red light at 630nm. A 2014 controlled trial showed significantly improved collagen density after 30 sessions at this wavelength. The light penetrates about 5mm, which is deep enough to reach the fibroblasts that produce collagen. Most LED masks specify their wavelength. If yours does not, that tells you something.

Radiofrequency at 1-2 MHz. This warms the dermis to 40-43 degrees, which triggers the body's own collagen remodelling response. It is the same principle used in aesthetic clinics. A 136-patient study confirmed measurable neocollagenesis over six months.

Microcurrent at 200-400 microamps. This operates at the body's own bioelectric frequency. A foundational 1982 study showed ATP production increases of up to 500 per cent. ATP is the fuel that drives cellular repair. Without enough of it, nothing rebuilds.

Does anything else work? I asked a dermatologist friend and she said, without hesitation: "Injection, clinic device, or energy-based home device. Those are your three options. Cream is not on the list."

Which left me looking for the third option.

One device that does all three.

I was sent a device by a Swedish company called Blocq earlier this year. It is called the No. 01 and it costs £139, which immediately felt suspicious because a single-modality competitor typically starts at £250.

It delivers all three modalities. Red light at 630nm. RF at 1-2 MHz. Microcurrent at 200-400 microamps. Plus EMS for the facial muscles, blue LED for surface congestion, and ionic transmission to push your serum past the stratum corneum instead of leaving it sitting on top.

Six modalities. One instrument. Five minutes each morning.

The No. 01. £139. blocq.store.

Does it work? I have been using it since February. The jawline is firmer. The texture has changed. My husband said I look rested, which is his highest compliment and which I have not heard since before perimenopause.

Is it a miracle? No. Genetics are undefeated, to borrow a phrase. But it is the first thing I have used that addresses the layer where the problem actually lives. And at £139 with a 60-night money-back guarantee, the risk is approximately the same as trying a new moisturiser. Except this one can actually reach the collagen.

Catherine, 49. Five days a week, five minutes per session, eight weeks. The collagen cliff, reversed. Unretouched.