Tendonitis is a common tendon problem that causes pain with activity. We know tendons respond to exercise therapy, and we sometimes add ibuprofen, GTN patches, shockwave, and injections. Recently, interest has grown in collagen supplements for tendonitis to speed healing. So do supplements for tendonitis work, and should you take them?
Supplements are one of several non-injection rehab adjuncts — alongside GTN patches and peptides.
Tendonitis: a breakdown in collagen structure
Tendonitis describes a breakdown of the collagen proteins in a tendon. We used to blame acute inflammation, but now think inflammation plays a smaller role. Gradual overload draws water between the collagen fibres, breaking the collagen down. Metabolic conditions such as obesity or diabetes can accelerate this.
Tendonitis causes pain from the tendon during or after activity — running with Achilles tendonitis, jumping with patellar tendonitis.
Exercise: the foundation treatment
Most tendons with collagen breakdown don’t respond to rest. Anti-inflammatories such as ibuprofen, once thought helpful, may delay healing if overused. Tendonitis responds best to a structured exercise programme — probably through exercise’s stimulating effect on collagen. We outline loading programmes for Achilles tendonitis and high hamstring tendinopathy elsewhere.
Can supplements help tendonitis?
Supplement use has exploded, and tendonitis is no exception. The common ones are collagen, turmeric, and free fatty acids. Below is the evidence — and whether they’re worth taking.
Collagen supplements for tendonitis
Collagen is the most-used tendon supplement. Taking collagen may, in theory, support the collagen breakdown seen in tendonitis. When you ingest gelatine or hydrolysed collagen, your body breaks it into amino acids, and more amino acids may support healthy tendon growth. But collagen alone won’t rebuild a tendon — you still need the heavy lifting of exercise therapy.
What the studies show
One study gave healthy participants a placebo, 5 g, or 15 g of gelatin collagen (with 48 mg vitamin C) an hour before a short skipping session, three times daily for three days. The 15 g group showed the biggest rise in collagen synthesis — supporting the idea that 15 g of gelatin collagen an hour before exercise boosts collagen production.
A separate study on mid-portion Achilles tendonitis found faster recovery when a hydrolysed collagen supplement was combined with strength training, versus strength training alone. Over six months, participants took 2.5 g of hydrolysed collagen (TENDOFORTE) or a placebo, half an hour before their Achilles exercises, with crossover at three months. In both periods, the collagen group improved tendon pain significantly more than the placebo. The authors concluded that specific collagen peptides may accelerate the benefit of a calf-strengthening programme.
Finally, a Spanish study found hydrolysed collagen (TENDOFORTE) plus tendon exercises improved Achilles pain more than exercise alone, with a bigger effect in earlier, milder tendonitis.
So, should you take collagen for tendonitis?
The evidence is mixed but encouraging — collagen supplements may help. But they’re an enhancer, not a stand-alone treatment: like GTN patches, shockwave, and injections, we use collagen to boost the effect of tendon-loading exercise. Until we have more data, stick to the studied doses:
- 2.5 g of hydrolysed collagen in a glass of cold water, about 30 minutes before tendon-loading exercise
- TENDOFORTE is the studied brand of hydrolysed collagen
- A minimum of 3 months of supplementation
Frequently asked questions about supplements for tendonitis
Are collagen supplements an add-on or a stand-alone treatment?
An add-on. They’re meant to enhance your rehab exercises, not replace them. We may also combine them with GTN patches, shockwave, or injections.
How much collagen should I take, and when?
The studied dose is 2.5 g of hydrolysed collagen, about 30 minutes before tendon-loading exercise, for at least three months. Some studies used up to 15 g of gelatin or collagen an hour before exercise.
Are collagen supplements allowed in elite sport?
Yes. The International Olympic Committee’s consensus statement notes that hydrolysed collagen may increase collagen synthesis and reduce tendon and joint pain.
Do other supplements help— turmeric or fish oil?
Despite wide use, there’s no good evidence that turmeric or free fatty acids reduce tendon pain or improve healing.
Do peptides help tendon healing?
Animal studies look promising, but solid human evidence is lacking. Dr Masci reviews the peptide evidence and the safety concerns here.
How long before collagen supplements work?
Allow at least three months, taken alongside a consistent tendon-loading programme — the supplement supports the exercise rather than working on its own.
Final word from Sport Doctor London about supplements for tendonitis
Based on current studies, we recommend hydrolysed collagen (TENDOFORTE) for upper- and lower-limb tendinopathy — combined with exercise therapy and other proven treatments. Don’t expect a supplement to fix a tendon on its own.
To discuss the right plan for your tendon problem, contact Dr Masci’s team here or call +44 (0) 203 488 0350.
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