Collagen types and joint health evidence reviewed
What it found
Native type II collagen and hydrolyzed collagen are the two most studied forms for joint health, and both have shown benefits in lab, animal and human studies.
The authors say the structure of each collagen type decides how it works.
What they found
Studies in people
Native type II collagen in people
Most human trials of native type II collagen for osteoarthritis reported improvements in pain and joint function. The usual dose was 40 mg per day, and the collagen came from chicken. One study found reduced cartilage degradation over 6 and 12 months, but others found no difference in serum biomarkers.
Hydrolyzed collagen in people
Human trials of hydrolyzed collagen for osteoarthritis also reported improvements in pain and function, but doses ranged from 720 mg to 10 g per day and study lengths varied. One study found increased proteoglycan content in knee cartilage after 24 weeks of 10 g per day.
Animal and lab studies
Native type II collagen in animals
In animal models of arthritis and osteoarthritis, oral native type II collagen reduced inflammation and cartilage breakdown. In a rat osteoarthritis model, 1 to 10 mg/kg reduced pain and inflammatory cytokines.
Hydrolyzed collagen in lab tests
In lab studies, collagen peptides stimulated cartilage cells to make proteoglycans and type II collagen. But when tested in human cartilage explants, three different products did not stimulate type II collagen production, and their activities varied greatly.
Other findings
Two main collagen types
Native collagen keeps its triple helix structure and works through an immune-mediated mechanism called oral tolerance. Hydrolyzed collagen has lost that structure and instead provides peptides that can reach joint tissues.
Dose difference
The therapeutic dose is much smaller for native collagen (40 mg per day) than for hydrolyzed collagen (5 to 10 g per day). This could affect which pill or capsule forms are practical to make.
What the authors conclude
“There are preclinical and clinical studies showing the safety and efficacy of ingredients containing native type II collagen or hydrolyzed collagen.”
Also in their conclusions
- They conclude that there is a clear link between collagen ingredient composition and chemical structure and its mechanism of action and efficacy.
- They advise that further research is required, including well-designed studies, to assess the therapeutic potential of each collagen type and composition for each clinical condition.
- They say novel research is needed to evaluate the potential benefit in populations with risk factors of osteoarthritis, as well as different osteoarthritis phenotypes and related disorders.
How it was done
Osteoarthritis is the most common joint disease, and there are no disease-modifying drugs for it. Safety concerns with long-term use of symptom-relief drugs have led people to look at collagen supplements as an alternative.
The authors reviewed published studies on different types of collagen used for joint health, including lab tests, animal models and human trials in people with osteoarthritis or joint discomfort. They compared how each collagen type is made, how it acts, and what doses and study lengths were used.
What it can’t tell you
- The human trials varied hugely in design, dose, and duration, so it is hard to draw overall conclusions about which collagen product works best.
- Lab and animal results cannot show what happens in people.
- The review cannot show whether collagen prevents osteoarthritis or slows its progression, only what was measured in the included studies.
Who paid
- Conflicts
- D.M.-P., E.C.-L., N.R.-R. and P.G.-M. are employees of Bioiberica S.A.U., a manufacturer of a nutritional ingredient containing native (undenatured) type II collagen.
The paper
- Title
- Collagen Supplementation for Joint Health: The Link between Composition and Scientific Knowledge
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Cite
- Martínez-Puig D, Costa-Larrión E, Rubio-Rodríguez N, Gálvez-Martín P (2023). Collagen Supplementation for Joint Health: The Link between Composition and Scientific Knowledge. Nutrients. doi:10.3390/nu15061332Free full textPubMed 36986062DOI
Summary written 26 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error