Inside the UK’s largest collagen clinical trial

When it comes to collagen supplements, one question comes up again and again: do they actually work?

At Absolute Collagen, that question led to the UK’s most robust clinical trial ever conducted on a collagen supplement - designed to deliver clear, measurable answers.

Led by our in-house scientist, supported by independent testing, and validated by medical and nutritional experts, this study set out to prove results.

The UK’s largest collagen clinical trial - what makes it different.

Clinical trials vary hugely in quality. Many involve small sample sizes, short timelines, or limited data collection.

This study was designed differently.

• 130 participants
• 12-week duration
• Placebo-controlled
• Independently run and analysed
• Peer-reviewed and published

Over 30,000 individual data points were collected. For context, many comparable supplement trials generate between 5,000 and 6,000 data points. The scale of this study allows for a far higher level of confidence in the results - not just whether something works, but how consistently it works across a population.

As Dr Dave Reilly, Senior Scientist at Absolute Collagen, explains, “The size and structure of this trial allowed us to measure changes with a level of detail and confidence that’s rarely seen in this category.”

The results?

The outcomes of the study were both measurable and visible.

After consistent daily use over 12 weeks:

• 100% saw a visible reduction in fine lines and wrinkles
• Skin elasticity increased by 60%
• New hair strands increased by 27%

These results weren’t based on perception alone. They were measured using validated clinical methods, comparing participants taking Absolute Collagen with those taking a placebo.

This is what allows the results to move beyond anecdotal evidence - and into clinically proven territory.

Why this level of data matters.

Not all clinical claims are equal. The reliability of a study depends on 3 key factors:

• Number of participants
• Quality of controls (such as placebo groups)
• Volume of data collected

In this case, all 3 were maximised.

“When you combine a placebo-controlled design with a large dataset, you reduce uncertainty. You’re not relying on isolated results - you’re seeing consistent patterns across thousands of measurements,” says Dr Dave Reilly.

This is what gives the findings real weight - and why they continue to underpin Absolute Collagen’s formulation and recommendations today.

How collagen works in the body.

Understanding the results starts with understanding how collagen functions biologically.

Collagen is the most abundant protein in the body, forming the structural framework of skin, hair, nails and connective tissue. As we age, natural collagen production declines - leading to visible changes such as reduced firmness, elasticity and hydration.

Supplementing with hydrolysed marine collagen provides the body with specific amino acids, which are absorbed into the bloodstream and used where they are needed most.

Nutritionist Jenna Hope explains: “Collagen peptides are broken down during digestion and absorbed efficiently. These amino acids can then support the body’s natural collagen production processes, particularly in the skin.”

At a cellular level, this includes supporting fibroblast activity - the cells responsible for producing collagen within the skin.

What doctors and experts say about collagen.

While scientific data provides the foundation, expert experience brings that data into real-world context.

As an aesthetic doctor, Dr Sophie Shotter focuses on treatments and routines that deliver visible, lasting results. “I recommend collagen as part of a broader approach to skin health. It’s not about replacing your routine - it’s about enhancing it with internal support” - she says.

This ‘inside-out’ approach is echoed across disciplines.

Trichologist Eva Proudman , who works with patients experiencing hair thinning and scalp concerns, sees similar patterns. “Hair is often one of the first areas to reflect internal changes. Supporting the body nutritionally can make a noticeable difference to both hair strength and scalp health”, claims Eva.

Together, these perspectives reinforce a consistent message: collagen is most effective when used as part of a structured, evidence-led routine.

Why Absolute Collagen is different.

Not all collagen supplements are formulated the same way.

Absolute Collagen is designed around the parameters used in the clinical trial - ensuring that the results seen in research can be replicated in real life.

Each daily serving contains:

• 8,000mg of premium, hydrolysed, Type 1 collagen
• Between 60mg and 120mg of vitamin C* to support collagen formation

*Depending on the supplement.

The formula is intentionally simple, delivering a clinically proven dose without unnecessary additives.

As Dr Sophie Shotter explains, “Absolute Collagen delivers exactly what the body needs to support results - the right dose, in a format that’s easy to take consistently.”

Consistency, as with any biological process, is key.

What results to expect - a realistic timeline.

One of the most common questions around collagen is how quickly results appear .

The Absolute Collagen clinical trial provides a clear framework:

• Weeks 1-4: internal support begins at a cellular level
• Around 6 weeks: early visible improvements may appear
• By 12 weeks: measurable improvements in skin quality, elasticity and appearance

Results can vary depending on age, lifestyle and baseline skin condition - but the data shows a clear pattern of progressive improvement over time.

The bottom line - clinical proof you can trust.

Collagen supplements have long been part of the conversation around skin and hair health. What has often been missing is robust, large-scale evidence. This clinical trial changes that.

With:

• 30,000 data points
• placebo-controlled design
• peer-reviewed publication
• multi-expert validation

Absolute Collagen is supported by one of the most comprehensive bodies of evidence in the category.

It’s about consistent, evidence-led support for your skin, hair and overall confidence - from within.