MagazineCollagen and joints: an honest review of the evidence (including what did not work)
Collagen and joints: an honest review of the evidence (including what did not work)
There is a lot of marketing around collagen and joints. Here is a sober overview of what the studies show, where the weaknesses are, and why you should not confuse a hydrolysate with type II for rheumatoid arthritis.
Short answer
The evidence for collagen hydrolysate and joints is mixed, not clear-cut. Lab work shows that collagen peptides drive cartilage cells to produce more type II collagen. Some clinical studies report less pain, others failed on the primary endpoint. On top of that, most of these studies ran on beef or porcine collagen, not marine. And careful: undenatured type II for rheumatoid arthritis is an entirely different thing from a hydrolysate. We will go through it honestly.
How it is supposed to work
Cartilage is largely type II collagen. The main lab finding comes from Oesser and Seifert (Cell and Tissue Research, 2003): collagen hydrolysate increased the production of type II collagen in cartilage cells roughly 2.5-fold, and specifically so, native collagen and a non-collagen protein had no effect. To this, the experiment in mice (Oesser et al., 1999) showed that absorbed peptides preferentially accumulate in cartilage. So the mechanism makes sense. This is cell and animal evidence.
What the clinic showed (and what it did not)
A randomized study on 147 athletes with joint pain (Clark et al., Current Medical Research and Opinion, 2008) gave 10 g of collagen hydrolysate a day for 24 weeks. Pain on walking fell compared with placebo (p = 0.003) and the largest effect was at the knee (p = 0.001). Participants also reached less often for physiotherapy and acupuncture.
Honesty, however, demands showing the other side too. A large international study on 389 patients with knee osteoarthritis (Moskowitz, 2000) failed overall against placebo on the primary endpoint; a significant difference appeared only in some centers. And the study by Rippe (n = 190) found an improvement in objective muscle strength, but no difference in subjective pain against placebo. The picture is therefore mixed.
Careful: type II for rheumatoid arthritis is not the same thing
Online, "collagen for joints" is often mixed together. These are two completely different things. The famous study in Science (Trentham et al., 1993) gave undenatured chicken type II collagen in microgram doses to patients with rheumatoid arthritis, an autoimmune disease. It works through immune "oral tolerance", not through building cartilage.
That is a different molecule (undenatured type II, not a hydrolysate), a different dose (micrograms, not grams), a different disease (autoimmune rheumatoid arthritis, not joint wear) and a different mechanism. The results of one category cannot be transferred to the other.
What about marine collagen here
An important admission: the joint clinical studies above used beef or porcine collagen, not marine. collalloc sells marine collagen, so we do not transfer these specific results to our product. The amino acid composition and mechanism are shared across collagen sources, but that is not the same as clinical evidence for fish collagen on joints. That is why we speak about joints soberly and without promises of treatment.
A realistic summary
- The mechanism is plausible. Peptides accumulate in cartilage and drive cells to produce type II collagen (lab, animals).
- The clinic is mixed. Some studies report less pain, others failed on the primary endpoint.
- Most data is beef/porcine. For marine collagen on joints a large human study is missing.
- It takes time. Where an effect appeared, it was months of regular use, not days.
- It is not a medicine. A dietary supplement does not treat osteoarthritis; joint pain belongs with a doctor.
The honest picture is mixed. And that is exactly why it can be trusted more than marketing promises.
Sources
- Oesser S., Seifert J. Stimulation of type II collagen biosynthesis and secretion in bovine chondrocytes cultured with degraded collagen. Cell and Tissue Research, 2003. doi.org/10.1007/s00441-003-0702-8
- Clark K. L. et al. 24-week study on the use of collagen hydrolysate in athletes with activity-related joint pain. Current Medical Research and Opinion, 2008. doi.org/10.1185/030079908X291967
- Moskowitz R. W. Role of collagen hydrolysate in bone and joint disease. Seminars in Arthritis and Rheumatism, 2000. doi.org/10.1053/sarh.2000.9622
- Trentham D. E. et al. Effects of oral administration of type II collagen on rheumatoid arthritis. Science, 1993. doi.org/10.1126/science.8378772
