When it comes to joint supplements, glucosamine and chondroitin often take center stage.
However, veterinary literature consistently highlights another ingredient: New Zealand green-lipped mussel (Perna canaliculus).
Green-lipped mussel is now one of the few joint supplements whose efficacy is supported by several studies in dogs. This doesn't mean it works miracles, but the evidence is stronger than for many other products sold for joints.
What is green-lipped mussel?
Perna canaliculus is a mussel native to New Zealand, recognizable by the green fringe on its shell.
It's of interest to researchers not simply because it's a marine product. It contains a blend of bioactive lipids, omega-3s, and other compounds that may contribute to its effects on joints.
There are primarily two types of products:
- whole mussel powder, usually freeze-dried;
- lipid extracts or concentrated oils.
These two forms are not identical. Their composition differs, as does their concentration of active substances. It is therefore difficult to directly compare the results of a study with any commercially available supplement.
How does it work?
The effects attributed to green-lipped mussel seem primarily related to its lipid fraction.
It notably contains several long-chain fatty acids, including ETA, as well as other compounds capable of influencing certain mechanisms involved in inflammation.
Experimental studies show that these extracts can act on different inflammatory pathways.
But two things must be distinguished:
- a plausible biological mechanism;
- demonstrated efficacy in dogs.
Clinical trials are what determine whether a supplement actually improves pain or mobility. Mechanisms alone are not enough to prove its effectiveness.
What do the studies show?
The meta-analysis by Barbeau-Grégoire et al. (2022) remains the reference for nutraceuticals used in canine osteoarthritis.
The authors analyzed 72 clinical trials on various dietary supplements.
Their conclusion is nuanced but interesting: results vary depending on the product, but green-lipped mussel is among the most promising supplements, alongside marine omega-3s.
Among the main studies:
- Hielm-Björkman et al. observed an improvement in pain and mobility in dogs receiving green-lipped mussel. However, the results remained inferior to those obtained with carprofen, a veterinary anti-inflammatory.
- Bui and Bierer also reported an improvement in osteoarthritis signs in supplemented dogs.
- Pollard et al. obtained encouraging results in dogs suffering from mild to moderate osteoarthritis.
- More recently, Alves et al. (2023) showed that marine lipid compounds improved certain objective parameters of locomotion, unlike the group receiving glucosamine and chondroitin.
Taken together, these studies suggest that green-lipped mussel has a higher level of evidence than many other joint supplements.
However, not all studies use the same products. Formulations, manufacturing processes, and concentrations vary greatly.
In other words, a supplement simply labeled "green-lipped mussel" does not necessarily offer the same guarantees as the products evaluated in clinical trials.
What dose is used?
As with most nutraceuticals, there is no universal dose valid for all products.
Studies use different formulations, which makes comparisons difficult.
For example, Hielm-Björkman et al.'s trial provided for a higher dose at the beginning of treatment, followed by a maintenance dose.
The most important thing, therefore, is not just the quantity administered, but whether the product is similar to those evaluated in the studies.
Product quality is essential
This is probably the most important point.
Researchers emphasize that the way the mussel is processed strongly influences its biological activity.
Excessive heat can degrade certain compounds of interest. Conversely, processes like freeze-drying or low-temperature stabilization help to preserve them better.
In other words, a distinction must be made between:
- a quality preparation, similar to those used in studies;
- a product simply containing a little green-lipped mussel for marketing reasons.
Therefore, not all supplements are equal.
Oil or powder?
Both forms exist in the scientific literature.
Whole mussel powder retains a wide range of components naturally present in the animal.
Lipid extracts, on the other hand, concentrate the compounds to which anti-inflammatory effects are attributed.
Currently, studies do not definitively conclude that one form is systematically superior to the other.
The most important factors remain manufacturing quality and product stability.
Marketing versus reality
Green-lipped mussel is the subject of many commercial promises.
It is claimed that it could replace anti-inflammatories, that it is dozens of times more powerful than omega-3s, or that its effects are proven by the traditional diet of the Maori.
These claims go far beyond what studies show.
Scientific literature supports a much more measured position:
- its mechanism of action is credible;
- several clinical trials show encouraging results;
- it is among the best-documented supplements for canine osteoarthritis.
However, it does not replace veterinary treatment when a dog is in severe pain.
For which dogs?
Green-lipped mussel can be beneficial for dogs with mild to moderate osteoarthritis, or as a complement in overall management.
It is generally integrated into a multimodal approach combining:
- weight control;
- appropriate physical activity;
- rehabilitation;
- pain treatments if necessary.
Its main advantage is providing a well-tolerated supplement with a higher level of evidence than many other nutraceuticals.
However, for a dog suffering from severe osteoarthritis or during a painful flare-up, it does not replace anti-inflammatories or pain relievers prescribed by the veterinarian.
Regarding prevention in predisposed breeds, data remains limited. The hypothesis is interesting, but current studies do not allow for a conclusion on demonstrated preventive effect.
Precautions for use
Studies report an overall good safety profile.
Observed side effects are mainly digestive and generally remain mild.
However, particular caution is recommended:
- for dogs allergic to shellfish;
- for those already receiving multiple treatments;
- in cases of coagulation disorders or before surgery.
No major interactions have been clearly demonstrated at commonly used doses, but this does not exempt discussing it with your veterinarian before starting supplementation.
Conclusion
New Zealand green-lipped mussel is now one of the best-documented joint supplements for dogs.
Studies show that it can help improve pain and mobility in some osteoarthritic dogs, with a good tolerance profile.
However, not all products are equivalent. Manufacturing quality, preservation method, and actual composition play an essential role, and a supplement simply containing "green-lipped mussel" does not automatically benefit from the same level of evidence as the formulations studied.
Finally, even if the results are encouraging, green-lipped mussel does not replace veterinary care. Like omega-3s, it primarily finds its place in a global strategy combining weight control, appropriate activity, rehabilitation, and treatments when necessary.
Why doesn't Canithermo include it in its supplements?New Zealand green-lipped mussel is an interesting ingredient, with encouraging data for osteoarthritic dogs. But at Canithermo, an active ingredient is not enough to be "promising" on paper. It must also be stable, well-standardized, well-tolerated, consistent with the final formula, and compatible with our quality requirements. Green-lipped mussel poses several limitations: its composition varies depending on the form used, its processing method, and its preservation. It also raises questions about shellfish allergies, marine origin, traceability, and impact on ecosystems. At this stage, Canithermo has therefore chosen not to include it. Not because it is without interest, but because we prioritize active ingredients that are more controllable, more consistent from batch to batch, and more aligned with our overall product approach. |
Sources
-
Barbeau-Grégoire M. et al. (2022). A Systematic Review and Meta-Analysis of Enriched Therapeutic Diets and Nutraceuticals in Canine and Feline Osteoarthritis. Animals.
-
Hielm-Björkman A. et al. (2009). Evaluating Complementary Therapies for Canine Osteoarthritis Part I: Green-lipped Mussel (Perna canaliculus).
-
Bui L.M., Bierer T.L. (2003). Influence of Green Lipped Mussels (Perna canaliculus) in Alleviating Signs of Arthritis in Dogs.
-
Pollard B. et al. (2006). Clinical efficacy and tolerance of an extract of green-lipped mussel (Perna canaliculus) in dogs presumptively diagnosed with degenerative joint disease.
-
Corbee R.J. (2022). The efficacy of a nutritional supplement containing green-lipped mussel, curcumin and blackcurrant leaf extract in dogs and cats with osteoarthritis.
-
Alves J.C. et al. (2023). Study of the effectiveness of glucosamine and chondroitin sulfate, marine based fatty acid compounds, and carprofen for the treatment of dogs with hip osteoarthritis.
-
Eason C.T. et al. (2018). Greenshell Mussels: A Review of Veterinary Trials and Future Research Directions.
-
Bierer T.L., Bui L.M. (2002). Improvement of arthritic signs in dogs fed green-lipped mussel (Perna canaliculus).
0 comments