Last reviewed: 1 August 2026
What can I take instead of collagen for joint pain?
There is no such thing as vegan collagen, but you do not need collagen to support your joints. Turmeric/curcumin (~1,000 mg/day) has the strongest anti-inflammatory evidence, glucosamine sulfate (1,500 mg/day) has the most data, MSM (1.5–3 g/day) gives modest knee relief, and omega-3, vitamin C and vitamin D cover the nutritional side. Adequate protein plus vitamin C lets your body build its own collagen. None of these beat strength training and weight management.
Why look for an alternative to collagen?
Every collagen supplement on the shelf comes from an animal. There is no plant source, because plants do not make collagen.
- Bovine collagen — from cattle hide. Not suitable for vegetarians or vegans, and rarely certified halal or kosher.
- Marine collagen — from fish skin and scales. Off-limits with a fish allergy.
- Undenatured type II (UC-II) — from chicken sternum cartilage.
Cost is the other reason people look elsewhere. A 10 g daily dose of hydrolysed collagen gets through a tub quickly, and the evidence behind it is younger and thinner than the marketing suggests.
What are the evidence-based alternatives?
Turmeric and curcumin — the strongest case
Curcumin blocks inflammatory pathways including NF-κB and COX-2. Trials of around 1,000 mg/day report pain and function improvements in knee osteoarthritis in some small trials. Evidence is limited, and curcumin is not an equivalent alternative to NSAIDs. Absorption is poor on its own, so look for piperine (black pepper extract) or a phospholipid formulation. Plant-based, so it fits every restricted diet. Full turmeric guide.
Glucosamine sulfate — the most-studied option
1,500 mg/day of glucosamine sulfate is the form with the best data, though results across trials are inconsistent and NICE does not recommend it. Most glucosamine is made from shellfish shells; vegetarian corn-fermented versions exist. Avoid it if you take warfarin, as it can raise INR. Full glucosamine guide.
MSM — modest but well tolerated
Methylsulfonylmethane at 1.5–3 g/day produced small improvements in pain and physical function in knee osteoarthritis studies. It is a sulfur compound, not animal-derived, and is one of the better-tolerated supplements. Full MSM guide.
Omega-3 — fish oil or algal oil
The evidence is strongest in rheumatoid arthritis, where 2.7 g+ of EPA/DHA a day reduces morning stiffness and tender joint counts. Vegans and anyone with a fish allergy can use algal oil, which supplies the same EPA and DHA grown directly from algae.
Vitamin C and adequate protein — the collagen builders
Your body synthesises its own collagen from amino acids, and the enzymes that do it require vitamin C. Older adults typically need 1.0–1.2 g of protein per kg of body weight a day to hold on to muscle, which is what stabilises an arthritic joint. Fruit and vegetables cover the vitamin C. This is what "vegan collagen" products are actually selling you — usually at a markup.
Vitamin D — correct a deficiency, do not megadose
Low vitamin D is common in the UK, particularly October to March, and is linked with muscle weakness and more pain. The standard advice is 10 µg (400 IU) daily through autumn and winter. Correcting a deficiency helps; taking more than you need does not.
"Vegan collagen" — read the label
These contain no collagen. They are blends of vitamin C, glycine, proline, zinc and botanical extracts. That is not a scam in itself — those nutrients do support collagen synthesis — but you can get the same from a decent diet and a cheap vitamin C tablet.
Which alternative suits which diet or allergy?
- Vegan or vegetarian: turmeric/curcumin, MSM, algal omega-3, vitamin C, lichen-derived vitamin D, corn-fermented glucosamine.
- Halal or kosher: the same plant and mineral based list — check capsule shells, as gelatin capsules are common. Look for vegetable cellulose (HPMC).
- Fish allergy: avoid marine collagen and fish oil; use algal omega-3 instead.
- Shellfish allergy: avoid standard glucosamine; turmeric and MSM are safe choices.
- On warfarin or other blood thinners: be cautious with turmeric, omega-3 and glucosamine — speak to your pharmacist before starting any of them.
What actually outperforms every supplement?
This is the uncomfortable part of any supplement page. The three things with the strongest evidence in osteoarthritis are free or nearly free:
- Strength and low-impact exercise. Building the muscle around a joint reduces pain and improves function more reliably than any capsule. Exercise hub.
- Weight management. Every pound lost takes several pounds of load off the knees and reduces systemic inflammation.
- An anti-inflammatory eating pattern. Mediterranean-style eating lowers pain and stiffness scores and supports weight control. Diet guide.
UK context: NICE guideline NG226 does not recommend any oral supplement for osteoarthritis, and none of the products on this page are prescribed. Any trial is at your own cost — so run one at a time, for 12 weeks, and stop if nothing changes.
Frequently asked questions
Build the foundation first
Supplements sit at the edges. Movement, weight and diet do the heavy lifting — start there, then trial one product for 12 weeks.
Read the collagen guideAnti-inflammatory dietExercise hub