Collagen Loss in Skin Ageing and What Can Be Done

Collagen is the most abundant protein in the skin and gives it firmness, fullness and resistance to tension. From around the age of 25 its production slows; the literature describes an average decline of about one per cent a year. This is a natural process, but the factors that determine its pace are largely within our control.

What accelerates the loss

Ultraviolet exposure

Sunlight is the strongest external driver of skin ageing. UV increases the production of enzymes that break collagen down — matrix metalloproteinases — while suppressing new collagen synthesis. The result, known as photoageing, leaves far more visible traces than intrinsic ageing.

Smoking

Smoking reduces blood flow in the dermis, increases oxidative stress and accelerates collagen breakdown. That skin changes appear earlier in smokers is well documented.

Other factors

Chronic sleep deprivation, air pollution, a high glycaemic load diet and the fall in oestrogen at menopause all affect the collagen balance. A marked increase in collagen loss during the first five years after menopause has been reported.

Approaches with the strongest evidence

Collagen loss cannot be stopped; the aim is to slow the breakdown and support production.

• Sun protection. Daily broad-spectrum sunscreen is the single most powerful and least expensive step against collagen breakdown — and it is needed on cloudy days too.
• Retinoids. Numerous studies show that topical retinoids increase collagen synthesis and reduce signs of photoageing. Start at a low concentration and low frequency to avoid irritation.
• Antioxidants. Vitamin C serums act as a cofactor in collagen synthesis and help reduce oxidative damage.
• Stopping smoking and regular sleep. Slow to show, but lasting in effect.

What about collagen supplements?

There are published studies on oral hydrolysed collagen peptides, some reporting measurable improvements in skin hydration and elasticity. Most, however, are short and industry-funded, so the level of evidence does not match that for sunscreen and retinoids. Anyone wishing to take a supplement should add it alongside the basics rather than in place of them.

What can be considered at the clinic?

Procedures aimed at stimulating collagen include microneedling, collagen-stimulating agents such as polycaprolactone and poly-L-lactic acid, PRP and certain laser protocols. What they share is the creation of a controlled renewal response that raises fibroblast activity. Which is appropriate depends on skin type, current findings, sun history and expectations.

One point deserves emphasis: none of these treatments delivers what is expected on skin that is not protected from the sun. Procedures carried out before the basics are in place do not repay the effort invested in them.

Priorities by decade

The same advice does not apply at every age; priorities shift.

Twenties. Here the subject is protection and building habits: daily sunscreen, not smoking, regular sleep. Intensive treatment programmes are not needed at this stage.

Thirties. The slowdown in collagen production begins to be noticeable. Adding a topical retinoid and an antioxidant to the routine is one of the steps that repays most in this decade.

Forties and beyond. The loss becomes more visible, and around menopause the process can accelerate. At this stage, treatments that support collagen production may be added alongside the basics, on the basis of examination.

This division is a rough frame rather than a fixed timetable; differences between individuals can matter more than age.

A realistic frame

Collagen loss is not a reversible state but a manageable process. What makes the greatest difference over the years is not a single treatment: it is the habit of sun protection, a life without cigarettes and a simple, consistent skincare routine. What we do in the clinic is added on top of that foundation.

The decision to treat follows a face-to-face examination in which skin type and findings are assessed.