Collagen for tendons in rugby

By Tom Francis·Updated 2026-09-03·3 sources·Editorial policy

What a tendon actually is

A tendon connects muscle to bone and its job is transmitting force. Structurally it is predominantly type 1 collagen arranged in parallel bundles, which is what gives it tensile strength along one axis.

Two properties matter for a rugby player. It has a poor blood supply compared with muscle, and its collagen turns over slowly. Together those mean tendon adapts on a longer timescale than the systems around it, which is the root of most tendon problems in the game.

Why that timescale causes trouble

Cardiovascular fitness returns within weeks of restarting. Muscle responds quickly to training. Tendon does neither.

So a player returning to pre season can feel fit, run well and produce force that their tendons are not yet conditioned for. That mismatch is why Achilles and patellar complaints cluster in the first weeks back, and why load progression rather than nutrition is the lever that actually moves it.

The research, described accurately

The work most often cited gives gelatin or hydrolysed collagen together with vitamin C roughly an hour before a short bout of loading exercise. The reasoning is that tendon's poor blood supply means amino acid availability at the moment of loading may matter, and that a short intense loading bout is the stimulus.

It is a plausible mechanism with a genuine literature behind it. It is research rather than an authorised claim, the protocols use doses of several grams rather than the roughly one gram in a capsule serving, and the outcomes measured are markers of collagen synthesis rather than injury rates. All three of those belong on any page citing it.

What is actually claimable

Collagen carries no authorised claim. Vitamin C does: it contributes to normal collagen formation for the normal function of cartilage, bones, skin, gums, teeth and blood vessels, at a serving providing at least 15 percent of its reference value.

Futuro Labs Marine Collagen provides 1200mg of type 1 hydrolysed marine collagen with 12mg of vitamin C at exactly 15 percent NRV and 1.5mg of zinc, for 28p a day. Because the vitamin C sits at the threshold, the claim holds only at the full two capsule serving.

Loading is the intervention with the record

For tendon, progressive loading is the thing with an actual evidence base. Heavy slow resistance work and isometric loading are both established in tendon rehabilitation and conditioning, and they are managed by a physiotherapist or a strength coach.

That is not a caveat added at the end of a supplement page. It is the main answer, and a site selling collagen while omitting it would be leaving out the part that works.

Where this stops

Tendon pain that persists, a tendon that has changed how it feels, morning stiffness in an Achilles that does not clear, or anything that got suddenly worse belongs with a physiotherapist.

Tendinopathy is a clinical problem with clinical management, and return to play is the judgement of whoever is assessing the player. Nothing on this page is about treating one, and Futuro Labs Marine Collagen is not offered as anything of the kind.

Who has the most coherent interest

Players with high repeated loading through specific tendons. Front row forwards through sustained scrum load, outside backs through Achilles and patellar load in repeated sprinting, and veterans across every position where tendon niggles that used to resolve stop doing so.

The claim position is identical for all of them, and the coherence of the interest is not. That distinction is what this page is for.

The tendons rugby actually loads

Three come up more than the rest, and knowing which is which helps a player describe a problem accurately when they do see someone.

The Achilles takes load on every stride and every scrum drive, and it is the tendon most associated with morning stiffness that clears after a few minutes of walking. The patellar tendon below the kneecap takes landing and cutting load, and it complains in players doing a lot of jumping or deceleration. The hamstring tendons at the back of the knee and the hip take load in sprinting, and they are the ones outside backs feel.

None of that changes the claim position. Futuro Labs Marine Collagen provides 1200mg of type 1 marine collagen with 12mg of vitamin C at 28p a day, and no authorised tendon claim exists for any of these structures.

Where to go next

• Collagen for ligaments in rugbyThe other connective tissue, and why it differs from tendon.
• When to take collagen around rugby trainingThe one timing argument on this site, and what it rests on.
• Does collagen work for joints in rugby?The claim position across the whole category.

Questions players ask

Sources

• EFSA register of nutrition and health claims
• Vitamin C enriched gelatin supplementation before intermittent activity augments collagen synthesis
• Food supplements guidance, gov.uk