Most people notice the first signs of skin ageing in their thirties, a softening of the jawline, fine lines that no longer disappear after a good night's sleep, a slight loss of the plumpness that characterised younger skin. These changes are not random. They follow a predictable biological pattern rooted in the gradual decline of two structural proteins: collagen and elastin.
Understanding what these proteins do, why they decline, and what can genuinely slow or reverse that decline is the foundation of any intelligent approach to skin health. This article explains the science clearly, without the marketing language that surrounds so many skincare conversations.
The Proteins That Give Skin Its Structure
Healthy, youthful skin is underpinned by three key structural components, all produced by fibroblast cells in the dermis, the deeper layer of skin beneath the surface.
Collagen
StructureThe most abundant protein in the skin, collagen forms a dense network of fibres in the dermis that gives skin its strength, thickness, and resistance to sagging. Think of it as the scaffolding that holds everything in place.
Elastin
ResilienceElastin fibres sit alongside collagen and give skin its ability to stretch and spring back. When you smile, squint, or raise your eyebrows, elastin is what allows the skin to return to its resting position. As elastin degrades, skin loses this rebound quality and fine lines begin to set.
Hyaluronic acid
HydrationA naturally occurring molecule that holds up to 1,000 times its weight in water. Hyaluronic acid keeps the skin plump, cushioned, and hydrated. Its decline with age contributes to the dry, crepey texture many people notice from their mid-thirties onward.
All three are produced by fibroblast cells, and fibroblast activity is precisely what treatments like Plasma Pen Fibroblast Therapy are designed to stimulate.
Why Collagen and Elastin Decline
Collagen and elastin loss is driven by a combination of biological ageing and external factors. Understanding both helps explain why two people of the same age can have dramatically different skin.
Intrinsic ageing
The biological clock that runs regardless of lifestyle. From our mid-twenties, collagen production declines by approximately one per cent per year. Fibroblast cells, the cells responsible for producing collagen and elastin, become less active, and the skin's renewal cycle slows. This is largely determined by genetics.
UV exposure
Ultraviolet radiation is the single largest external contributor to premature skin ageing. UV rays break down collagen and elastin fibres directly, and trigger the production of enzymes called matrix metalloproteinases (MMPs) that degrade the skin's structural proteins. Decades of cumulative sun exposure account for the majority of visible ageing in most people.
Hormonal changes
Oestrogen plays a significant role in maintaining skin thickness and collagen density. In the years around menopause, oestrogen levels decline sharply, and with them, collagen production accelerates its decline. Studies suggest skin loses up to 30 per cent of its collagen in the first five years after menopause.
Lifestyle factors
Smoking, poor nutrition, chronic stress, and inadequate sleep all accelerate collagen breakdown. Smoking in particular generates free radicals that directly damage collagen fibres and impair the skin's ability to repair itself. A diet low in antioxidants and protein also limits the raw materials the body needs to synthesise new collagen.
Repeated muscle movement
Every facial expression, smiling, squinting, frowning, creates a crease in the skin. When skin is young and elastin is abundant, it springs back. As elastin degrades, these repeated creases gradually become permanent lines, particularly around the eyes, forehead, and mouth.
What Actually Happens in the Skin as We Age
The visible signs of ageing are the surface expression of changes happening deep in the dermis. As collagen fibres thin and fragment, the skin loses its structural support, leading to sagging, hollowing, and the deepening of folds. As elastin degrades, the skin loses its ability to rebound, and expression lines become permanent.
The dermis itself thins over time. A 70-year-old's dermis may be only 60 to 70 per cent as thick as it was at 20. This thinning makes the skin more fragile, more transparent, and less able to retain moisture. The fat pads beneath the skin also shift and diminish, contributing to the hollowed appearance around the eyes, temples, and cheeks that characterises facial ageing.
Key insight
Collagen production begins declining from the mid-twenties at approximately one per cent per year. By the time visible changes appear, the cumulative loss is already significant, which is why prevention is far more effective than correction.
What Can Actually Help
Not all collagen-boosting claims are equal. Here is an honest assessment of the approaches with the strongest evidence base.
Plasma Pen Fibroblast Therapy
Creates controlled micro-injuries that directly stimulate fibroblast activity, triggering the production of new collagen and elastin. One of the most targeted collagen induction approaches available without surgery.
Microneedling
Fine needles create micro-channels in the skin to stimulate a healing response and collagen production. Effective for mild to moderate laxity and skin texture concerns.
Retinoids
Vitamin A derivatives (retinol, tretinoin) are among the most evidence-backed topical ingredients for stimulating collagen synthesis and slowing its breakdown. Consistent long-term use produces measurable improvements in skin thickness and texture.
Sun protection
Daily SPF 50+ is the single most effective preventive measure against collagen degradation. Protecting existing collagen is just as important as stimulating new production.
Nutrition
Collagen synthesis requires vitamin C, zinc, and adequate dietary protein. A diet rich in antioxidants also helps neutralise the free radicals that accelerate collagen breakdown.
The Fibroblast Connection
Fibroblast cells are the skin's collagen factories. They are responsible for synthesising collagen, elastin, and hyaluronic acid and their activity is the central target of most effective anti-ageing treatments.
As we age, fibroblasts become less active and less responsive. The key to meaningful skin rejuvenation is finding ways to reactivate them. This is precisely what Plasma Pen Fibroblast Therapy produce the controlled plasma energy creates a stimulus that prompts fibroblasts to produce fresh collagen and elastin, gradually remodelling the skin from within.
Unlike topical products that work at the surface, or fillers that temporarily add volume without addressing the underlying cause, fibroblast-stimulating treatments work at the level of the dermis, where the structural changes of ageing actually occur.
Frequently Asked Questions
At what age does collagen loss become noticeable?
Collagen production begins declining in the mid-twenties, but visible changes typically become apparent in the early to mid-thirties, when the cumulative effect of years of gradual loss starts to show as fine lines, reduced plumpness, and early laxity.
Can you rebuild lost collagen?
You cannot fully reverse decades of collagen loss, but you can meaningfully stimulate new collagen production through targeted treatments and consistent skincare. Treatments like Plasma Pen Fibroblast Therapy work by activating fibroblast cells to produce fresh collagen, which gradually improves skin firmness and texture over time.
Do collagen supplements work?
The evidence for oral collagen supplements is growing. Hydrolysed collagen peptides have been shown in several studies to improve skin elasticity and hydration. However, results are modest compared to topical and in-clinic treatments that directly stimulate the skin's own collagen-producing cells.
How does Plasma Pen stimulate collagen specifically?
The plasma arc creates tiny controlled injuries on the skin surface. The body responds by activating fibroblast cells in the dermis, which produce new collagen and elastin as part of the healing process. This is the same mechanism the body uses to repair wounds, Plasma Pen simply harnesses it in a precise, controlled way.
Final Thoughts
Skin ageing is inevitable, but its pace and extent are significantly influenced by the choices we make and the treatments we invest in. Understanding the biology of collagen and elastin loss moves the conversation away from marketing promises and toward evidence-based decisions.
The most effective approach combines consistent daily sun protection, targeted topical ingredients, and in-clinic treatments that directly stimulate fibroblast activity. If you would like to understand which treatments are most appropriate for your skin and your stage of ageing, a consultation is the best place to start.