Collagen for Athletes UK: Why It's More Than a Beauty Supplement

Ask most people at the gym what collagen is for and you'll get the same answer: skin, hair, nails. It's filed under skincare, not sports nutrition, and that reputation means a lot of active people write it off before they've looked at what it actually does. Searches for collagen for athletes are still a fraction of the volume of "collagen for skin", but the biology tells a different story. Collagen is the most abundant protein in the human body. It's found in muscle, tendon, ligament and cartilage, not just skin, and once it's digested it behaves like any other protein source, going wherever the body needs it most.

For anyone training regularly, that matters. This post looks at why the "beauty supplement" label doesn't hold up, what the research actually shows about collagen and athletic performance, and where a drink like JUCED fits into that picture.

Why athletes dismiss collagen, and why that's worth reconsidering

The beauty industry got to collagen first. Supplements, serums and powders were marketed around skin elasticity and anti-ageing for years before anyone was talking about collagen in a training context, and that early positioning stuck. It's an understandable assumption, but it's an incomplete one.

What happens once you actually drink it

Protein, from any source, doesn't stay intact once it reaches the stomach. It's broken down into individual amino acids, absorbed into the bloodstream, and allocated by the body wherever it's needed, whether that's muscle repair, tendon maintenance or skin. Collagen is no exception, and if you want the fuller picture of what is collagen protein and where it comes from, that's worth a read. Its amino acid profile is dominated by glycine and proline, two amino acids that are essential building blocks for connective tissue, not just skin. That's the part the "beauty supplement" framing leaves out.

It's not a replacement for whey, it's a different job

Whey protein is well studied for muscle protein synthesis and is rich in branched-chain amino acids like leucine. Collagen has a different amino acid profile, one suited to tendons, ligaments and the connective tissue that surrounds muscle fibres, rather than muscle fibres themselves. Neither outperforms the other across the board. They're complementary, and for athletes specifically, collagen's role in supporting connective tissue is one whey doesn't fill in the same way.

What the research says about collagen for athletes UK

This is where the athletic case for collagen gets stronger, and more recent than most people realise.

Tendons, ligaments and the Shaw and Zdzieblik studies

A 2017 study led by Shaw and published in the American Journal of Clinical Nutrition found that Vitamin C-enriched collagen supplementation supported collagen synthesis when timed around exercise. Two years later, a 2019 study by Zdzieblik in the British Journal of Nutrition found that collagen peptide supplementation combined with resistance training led to greater increases in fat-free mass and muscle strength compared to a placebo group doing the same training. Neither study claims collagen is a shortcut. What they show is that collagen protein, taken alongside training, has a measurable role in body composition and connective tissue outcomes that goes well beyond skin.

A more recent, more complete picture

A November 2024 systematic review and meta-analysis, one of the first comprehensive investigations of its kind, examined long-term collagen peptide supplementation combined with regular physical training. It found evidence for increases in tendon cross-sectional area and stiffness at daily intakes of 15 to 30g combined with resistance training, along with improvements in body composition and muscle recovery across the studies reviewed. A separate 2024 narrative review focused specifically on athletes found that collagen peptides were linked to improved joint stability, reduced joint pain and accelerated recovery from Achilles tendon injuries. Tendons and ligaments are primarily made of Type I collagen and have a comparatively poor blood supply, which is part of why they recover more slowly than muscle after training. Research suggests collagen protein, alongside its Vitamin C cofactor, has a specific role to play here, and the connection runs close to what we've covered before on collagen and joint health.

Vitamin C: the part of the story most collagen products skip

Collagen doesn't work in isolation. Vitamin C contributes to normal collagen formation for the normal function of cartilage, bones, skin and blood vessels, and it's a direct cofactor for the enzymes the body uses to build and cross-link collagen. Without enough of it, the body can't produce or maintain collagen effectively, regardless of how much collagen protein you're consuming.

Why timing matters for athletes specifically

A 2024 study on resistance-trained males found that collagen synthesis response was greater when 30g of hydrolysed collagen was taken with 50mg of Vitamin C around an hour before resistance exercise, compared with lower doses or none at all. The theory is straightforward: exercise increases blood flow to tendons and connective tissue, so having collagen's amino acids and its Vitamin C cofactor circulating at that point means the body is better placed to put them to use. Vitamin C also contributes to the normal function of the immune system during and after intense physical exercise, and contributes to the reduction of tiredness and fatigue, both relevant in the hours after a hard session.

Where JUCED fits in

Every can of JUCED combines 15g of hydrolysed bovine collagen protein with 100% of the daily recommended intake of Vitamin C, in a light, fruit-based drink rather than a shake. That combination, collagen plus its Vitamin C cofactor in one format, is the exact pairing the more recent research points to, and it's not something most RTD protein drinks on the market are built around.

Because it's hydrolysed, the collagen in JUCED is broken down into smaller peptides that dissolve completely into the drink, with no grittiness and no heaviness. That makes it easy to drink before training without sitting on the stomach, or straight after a session when preparing a shake is the last thing you want to do. It's part of why every gym that has trialled JUCED, including the Foundry network, has gone on to stock it permanently.

Who this is most relevant for

Anyone training regularly, whether that's resistance training, running, cycling or team sport, is putting repeated load through tendons and ligaments as well as muscle. It's also worth a look for anyone who has previously dismissed collagen products as irrelevant to training, or who finds whey-based shakes heavy or hard to digest around a workout.

The bottom line on collagen for athletes UK

Collagen for athletes isn't a beauty crossover story, it's a connective tissue and recovery story that the beauty industry simply reached first. The research on tendon health, joint comfort and body composition, especially when collagen is paired with Vitamin C and timed around training, makes a case that has nothing to do with skin. If you train regularly and haven't considered collagen protein before, it's worth looking past where the category started and at what the more recent evidence actually shows. Ready to see how it fits into your own routine? Try JUCED and get 15g of collagen protein and 100% of your daily Vitamin C in one can.

Frequently asked questions

Is collagen actually useful for athletes, or is it just a beauty supplement?

Collagen is the most abundant protein in the body and is a major structural component of tendons, ligaments and the connective tissue around muscle, not just skin. Once digested, it's broken down into amino acids and used wherever the body needs it. Research suggests it has a specific role in supporting connective tissue and recovery around training, distinct from its more familiar beauty positioning.

What's the difference between collagen and whey protein for athletes?

Whey is well studied for muscle protein synthesis and is rich in leucine and other branched-chain amino acids. Collagen has a different amino acid profile, high in glycine and proline, which is more specifically suited to tendon, ligament and connective tissue repair. They serve complementary purposes rather than one replacing the other.

Why is Vitamin C included alongside collagen in JUCED?

Vitamin C is a direct cofactor for the enzymes involved in collagen synthesis, and it contributes to normal collagen formation for cartilage, bones, skin and blood vessels. Without adequate Vitamin C, the body cannot produce or maintain collagen effectively, so pairing the two, as JUCED does with 15g of collagen and 100% of daily Vitamin C, reflects what the research points to.

When is the best time for athletes to have collagen protein?

Some research suggests taking collagen alongside Vitamin C around 30 to 60 minutes before resistance exercise may support a stronger collagen synthesis response, since exercise increases blood flow to tendons and connective tissue. That said, consistency matters more than exact timing for most people, and JUCED's light, no-prep format makes it easy to have before or after training.

Can collagen protein drinks help with joint or tendon discomfort from training?

Some research indicates that hydrolysed collagen, particularly alongside Vitamin C, may support joint comfort and tendon structure in active people. It isn't a treatment for injury or a diagnosed condition, and anyone dealing with ongoing pain should speak to a healthcare professional, but it's a reasonable, evidence-informed addition to a training routine.