Why Does Collagen Decline? The Science of Regenerative Anti-Ageing

Fibroblasts are the most critical cells in the dermis, responsible for synthesising collagen, elastin and hyaluronic acid. The essence of anti-ageing is to keep activating fibroblast activity. What is commonly called “collagen” is in fact a composite network: collagen is like the steel reinforcement in a building, providing support and toughness; elastin gives skin its elasticity, ensuring it can return to shape after stretching; reticular fibres are the earliest scaffolding framework.

Type I and Type III collagen

With ageing, Type III collagen is lost rapidly and replaced by Type I, leaving skin that is “thick” yet “hard”, without a soft feel, with fine lines and laxity coexisting.

Five major causes of collagen loss

• Ultraviolet light (photoageing) — the number-one killer. UV-A reaches the dermis directly and triggers matrix metalloproteinases (MMPs) that destroy collagen structure
• Skin glycation — excess sugars bind with collagen to form AGEs, making it brittle and yellowed
• Free-radical attack — from pollution, stress and late nights, oxidatively damaging collagen fibres
• Chronic inflammation — poor gut health, stress and similar factors continually produce inflammatory mediators that suppress fibroblast activity
• Lifestyle — smoking, late nights and uneven nutrition hinder collagen synthesis

Daily care and nutritional support

• Sun protection is the first step, defending against photoageing
• Quality protein (eggs, beans, fish, meat, soy) provides glycine, proline and other building blocks
• Vitamin C is an essential cofactor for collagen synthesis
• Antioxidants (blueberries, tomatoes, green tea) and Omega-3 fatty acids (oily fish, flaxseed)
• Hydrolysed collagen peptides have small molecules that are readily absorbed and can provide a “signal” to fibroblasts, stimulating the skin’s own collagen synthesis

Medical regenerative treatments

Injectable treatments (targeted induction): collagen biostimulators such as Sculptra (PLLA) use microspheres as a biological signal, continually stimulating new Type I collagen; results appear progressively and may last more than two years. Ellansé (PCL) has a dual “immediate plus long-acting” mechanism, promoting new Type I and Type III collagen at the same time.

Energy-based devices (full-field activation): Thermage FLX uses monopolar radiofrequency to heat the dermis, immediately contracting lax collagen and, over the following months, stimulating abundant new Type I collagen — suitable for mild-to-moderate laxity. Fractional laser/radiofrequency creates fine heated zones, triggering a wound-healing response and strongly promoting multiple types of new collagen.