Collagen is best known as a beauty supplement, but some of its most interesting research is about knees. Here's what the trials in athletes and people with osteoarthritis found, what doses they used and where the evidence is still thin.
Written by Vita Globe Editorial Team | Reviewed against a meta-analysis and randomized controlled trials
Does collagen help joints?
Possibly, for some people. A 2019 meta-analysis of placebo-controlled trials found collagen improved osteoarthritis symptom scores and pain ratings[1]. Trials in active adults with joint discomfort also reported less activity-related pain using 5–10 g of collagen peptides daily for 12–24 weeks[2][3].
Caveat: Many joint trials were small or industry-funded, and effects on some pain measures weren't significant[1]. Collagen isn't a treatment for arthritis.
Sources: García-Coronado 2019 · Clark 2008 · Zdzieblik 2017 · Verified 2026-09-27
In this article
Why would collagen matter for joints?
Joints rely on collagen-rich tissues. Cartilage is built largely on type II collagen, while tendons and ligaments are mostly type I. The idea behind collagen supplements is that digested collagen peptides might provide building blocks, or signals, that support the cells maintaining these tissues. That theory is still being tested, so the best way to judge collagen for joints is by what happened to people in controlled trials.
Two different product types have been studied: hydrolyzed collagen in gram doses and undenatured type II collagen in milligram doses. We explain the difference in Collagen Types 1, 2 & 3.
What did trials in active people find?
Athletes with activity-related joint pain (2008). In a 24-week trial, 147 athletes were randomized to 10 g of collagen hydrolysate a day or placebo; 97 completed the study with usable data. The collagen group showed statistically significant improvements in several pain measures, and the effect was larger in the subgroup with knee pain[2]. The study was sponsored by a collagen hydrolysate manufacturer, and about a third of participants didn't finish, both of which limit how much weight it can carry.
Young adults with knee discomfort (2017). In a 12-week trial, 139 active young adults with functional knee problems took 5 g of specific collagen peptides or placebo daily. Pain during activity improved significantly more with collagen, confirmed by both participants and physicians. Pain at rest improved in both groups, with no significant difference between them[3].
What about osteoarthritis?
A 2019 meta-analysis pooled randomized, placebo-controlled trials of collagen in people with osteoarthritis. Collagen significantly improved the total WOMAC index (a standard score combining pain, stiffness and function) and pain on a visual analog scale. Looking at WOMAC subscores, stiffness improved significantly, but pain and function subscores didn't[1].
For undenatured type II collagen, a multicenter trial randomized 191 people with knee osteoarthritis to 40 mg a day, placebo, or glucosamine plus chondroitin for 180 days. The type II group had a significantly greater reduction in total WOMAC score than both placebo and glucosamine plus chondroitin, and the supplement was well tolerated[4].
| Study | Who | Dose | Length | Main finding |
|---|---|---|---|---|
| Clark 2008[2] | 147 athletes | 10 g hydrolysate | 24 weeks | Less joint pain on several measures |
| Zdzieblik 2017[3] | 139 active young adults | 5 g peptides | 12 weeks | Less activity-related knee pain |
| Lugo 2016[4] | 191 with knee OA | 40 mg undenatured type II | 180 days | Lower WOMAC score vs. placebo |
| García-Coronado 2019[1] | Meta-analysis, OA | Various | Various | Better total WOMAC and VAS pain |
What are the limits of this research?
- Small trials. Most studies enrolled one to two hundred people.
- Industry funding. Several trials were funded by ingredient makers[2]. That doesn't make them wrong, but independent replication matters. In skin research, a 2025 meta-analysis found benefits mainly in industry-funded studies, a pattern worth watching in joint research too.
- Mixed outcomes. Not every measure improved. In the meta-analysis, WOMAC pain and function subscores didn't change significantly[1].
- Specific doses. Results came from 5–10 g of hydrolyzed collagen or 40 mg of undenatured type II. Lower doses of hydrolyzed collagen aren't tested.
The honest summary
- Collagen has modest, promising data for activity-related joint discomfort and osteoarthritis symptoms.
- Effective hydrolyzed collagen doses in trials were 5–10 g a day for 12–24 weeks[2][3].
- Undenatured type II is a separate product studied at 40 mg[4].
- It's a possible support, not a treatment. Joint pain deserves a proper medical evaluation.
What does this mean for you?
If you're active and want to try collagen for joint comfort, the research points to gram-level doses of hydrolyzed collagen taken daily for at least three months. Collagen is not a substitute for strength training, weight management, physical therapy or medical care, all of which have much stronger evidence for joint health. If you have diagnosed arthritis or persistent pain, talk to your doctor before adding supplements.
Also know that most beauty-focused collagen products, especially gummies, are designed for hair, skin and nails routines and may not contain the amounts used in joint trials. See Collagen Gummies vs. Powder for how to compare doses, and How Long Does It Take for Collagen to Work? for timelines.
Our option
Vita Globe Hydrolyzed Collagen Gummies – 60ct
To be clear, our collagen gummies are made to support healthy hair, skin and nails*, not as a joint product. They contain hydrolyzed collagen peptides in a fruit-flavored gummy (2 gummies once daily, preferably with a meal), and every Vita Globe product is tested by an independent third-party lab. If joints are your main goal, compare the Supplement Facts panel with the trial doses above.
Frequently asked questions
How much collagen should I take for joints?
Trials of hydrolyzed collagen used 5–10 g a day[2][3]; a trial of undenatured type II used 40 mg a day[4]. Ask your healthcare provider what's right for you.
How long does collagen take to help joints?
Joint trials ran 12 weeks to 6 months[3][4].
Is collagen better than glucosamine?
In one trial, 40 mg of undenatured type II collagen outperformed glucosamine plus chondroitin on WOMAC scores[4]. That's one study, so it isn't a settled answer.
Can collagen rebuild cartilage?
The trials measured symptoms like pain and stiffness, not cartilage regrowth[1]. There's no good evidence that collagen supplements rebuild cartilage.
Is collagen safe for joints long term?
Trials up to 24 weeks reported collagen was well tolerated[4]. See Collagen Side Effects for more.
Sources
- García-Coronado JM, Martínez-Olvera L, Elizondo-Omaña RE, et al. Effect of collagen supplementation on osteoarthritis symptoms: a meta-analysis of randomized placebo-controlled trials. Int Orthop. 2019;43(3):531-538. doi:10.1007/s00264-018-4211-5
- Clark KL, Sebastianelli W, Flechsenhar KR, et al. 24-Week study on the use of collagen hydrolysate as a dietary supplement in athletes with activity-related joint pain. Curr Med Res Opin. 2008;24(5):1485-1496. doi:10.1185/030079908X291967
- Zdzieblik D, Oesser S, Gollhofer A, König D. Improvement of activity-related knee joint discomfort following supplementation of specific collagen peptides. Appl Physiol Nutr Metab. 2017;42(6):588-595. doi:10.1139/apnm-2016-0390
- Lugo JP, Saiyed ZM, Lane NE. Efficacy and tolerability of an undenatured type II collagen supplement in modulating knee osteoarthritis symptoms: a multicenter randomized, double-blind, placebo-controlled study. Nutr J. 2016;15:14. doi:10.1186/s12937-016-0130-8
About the Vita Globe Editorial Team
The Vita Globe Editorial Team researches and writes our wellness content, working from peer-reviewed research, systematic reviews and guidance from bodies such as the NIH and the FDA. We cite our sources inline and update articles when the evidence changes.
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for medical advice. Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or caring for a child.
