Collagen has become one of the most discussed topics in modern skincare—and one of the most misunderstood. It appears in serums, supplements, and social media feeds with remarkable frequency and inconsistency. 

Myth 1: Applying Collagen Topically Replaces What Skin Has Lost

This is the most persistent misconception in collagen skincare. Collagen molecules - in their intact, native form - are far too large and thus unable to cross the epidermal barrier to reach the dermis, where the body’s natural collagen matrix resides.

While native collagen cannot penetrate the skin, it is not entirely without merit in cosmetic formulations. When collagen is subjected to hydrolysis—a chemical process that breaks the long protein chains into smaller peptides—the resulting "hydrolysed collagen" has a significantly lower molecular weight. These smaller fragments act as effective humectants that improve surface hydration and support the skin’s moisture barrier. However, it is scientifically inaccurate to equate this surface-level hydration with the biological replacement of structural collagen within the dermal layers.

Myth 2: Collagen Loss Is Simply a Result of Ageing 

While the chronological ageing is the most significant factor in collagen degradation, it is not the only one since collagen decline is a multifactorial phenomenon.

Extrinsic factors significantly accelerate this process. Ultraviolet (UV) radiation is the primary environmental cause of collagen degradation, inducing the production of free radicals that damage the skin's structural proteins. Furthermore, the process of glycation (where excess blood sugar molecules bond to collagen fibers to create AGEs - Advanced Glycation End-products), which cause collagen to become stiff, brittle, and prone to fragmentation.

UV exposure is the primary extrinsic cause of collagen degradation. Other lifestyle factors, including environmental pollution, smoking, and rapid fluctuations in body mass, further exacerbate the breakdown of the dermal matrix.

Myth 3: Drinking Collagen Supplements Directly Rebuilds Skin

Ingestible collagen supplements have attracted considerable attention. When collagen is ingested, it does not travel intact to the dermis. Instead, the gastrointestinal tract subjects these proteins to enzymatic hydrolysis, breaking them down into constituent amino acids and small peptides which are absorbed into the bloodstream and distributed throughout the body based on systemic metabolic needs rather than localised aesthetic requirements. There is currently no verified physiological mechanism that directs these specific amino acids exclusively to the skin to rebuild collagen fibres.

Some studies have observed modest improvements in skin elasticity and hydration after several months of consistent supplementation. However, the quality of evidence remains heterogeneous. The current body of clinical data does not definitively support the claim that ingestible collagen can significantly "firm" the skin in the manner often marketed by the beauty industry.

The Correct Approach: Supporting the Skin’s Own Collagen Production

The three myths addressed above share a common thread: they all attempt to deliver collagen from the outside in. Topical collagen molecules cannot penetrate the dermis. Oral collagen cannot be directed from the gut to the skin. Collagen “booster” claims are rarely tied to the mechanism that would make them meaningful. The category is not short of ambition. It is short of precision.

The alternative is to support the skin’s natural production of collagen. This is a fundamentally different proposition. Rather than attempting to supplement a structural protein that the skin cannot absorb, it works with the skin’s own biology: activating the cellular mechanisms responsible for Type I collagen synthesis from within the dermis, where collagen is actually made.

“Loss of collagen. This isn't about a quick fix. It's about supporting the skin's natural regenerative processes. Our formula is designed to help optimise the microenvironment of the extracellular matrix and provide the necessary building blocks. Multiple active ingredients work synergistically to empower your skin to boost its own collagen production. Skincare shouldn't just promise to add collagen - it should support the skin’s innate capacity for renewal.”

Dr Marko Lens, Founder and Formulator of Zelens.

Shop our brand new skincare innovation Collagen Solution Firming Serum.