Comparison: the best joint supplements for dogs

Stiffness in cold weather, limping on waking, difficulty climbing stairs… These signs do not lie: many dogs suffer from joint problems, sometimes well before senior age. Faced with this reality, many owners turn to dietary supplements to support mobility and joint comfort. But not all are equal. Which active ingredients have truly proven effective in dogs? And which rely more on reputation than science?

This article draws on the most recent veterinary clinical reviews to distinguish supplements that are genuinely effective from those whose benefits remain uncertain.

A scientific review of joint supplements

In 2022, researchers from the Faculty of Veterinary Medicine in Montreal published a systematic review of available clinical studies on dietary supplements for arthritic dogs and cats (Barbeau-Grégoire et al., 2022).

Active ingredients are classified according to:

• methodological rigour,
• the strength of observed effects,
• and the level of clinical evidence.

Among the 72 trials analysed, Omega-3 fatty acids and green lipped mussel emerged as the most effective and clinically best-documented active ingredients, far ahead of other widely marketed ingredients such as glucosamine, collagen or botanical extracts.

Barbeau-Grégoire

Marine Omega-3: the best-proven efficacy

Marine omega-3 fatty acids, primarily EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), are naturally present in green-lipped mussel, fish oil, microalgae and krill. Thanks to their anti-inflammatory properties, they help to reduce pain, preserve cartilage and improve mobility in dogs with osteoarthritis.

What the studies show

• Several clinical trials have shown a reduction in pain, improved mobility and better weight-bearing in the affected limb in arthritic dogs supplemented with EPA and DHA.
• Omega-3 may also reduce the need for anti-inflammatory drugs (NSAIDs) in some dogs, while improving their quality of life.
• The Barbeau-Grégoire (2022) analysis classifies Omega-3 in category 1, the highest level of evidence among all active ingredients studied.

Which Omega-3 sources should you choose?

Oils from New Zealand green-lipped mussel and microalgae contain omega-3 fatty acids in phospholipid and triglyceride forms. They offer superior bioavailability, are better tolerated digestively, and have no impact on marine biodiversity.

Green lipped mussel oil: a rare and highly promising ingredient

Unlike many joint supplements that rely mainly on glucosamine or chondroitin, green-lipped mussel oil (Perna canaliculus) is one of the few ingredients to have been the subject of several recent veterinary studies in dogs.

Its composition is particularly interesting as it combines:

• naturally occurring marine Omega-3 (EPA, DHA and ETA);
• furan fatty acids, rare marine lipids with antioxidant and anti-inflammatory properties;
• natural carotenoids that help protect cells against oxidative stress.

Work published in recent years shows that green lipped mussel oil acts simultaneously on several mechanisms involved in osteoarthritis:

• reduction of several inflammatory mediators (TNF-α, IL-1β, IL-6, PGE2);
• inhibition of major inflammatory pathways such as COX, 5-LOX, NF-κB and MAPK;
• support for cartilage and joint tissues;
• limitation of oxidative stress responsible for the progressive degradation of joints.

Benefits proven by veterinary studies

Research published in recent years confirms that green lipped mussel oil (Perna canaliculus) is one of the best-documented ingredients for supporting canine joints. The main clinical studies highlight:

• Reduction of joint pain, with improved comfort observed from 2 to 4 weeks in some dogs.
• Improved mobility, locomotion and weight-bearing in the affected limb, measured by objective tools such as Peak Vertical Force (PVF).
• Decrease in lameness and improvement in locomotor performance, both in arthritic dogs and in active dogs with musculoskeletal disorders.
• Documented anti-inflammatory action, with a reduction in certain biomarkers of inflammation and cartilage degradation, suggesting sustained support for joint health.
• Efficacy comparable to certain non-steroidal anti-inflammatory drugs (NSAIDs) in several studies, with even better results when both approaches are combined.
• Superior performance to fish oil in a 24-week comparative study, with faster and more marked improvements in mobility and joint function.
• Excellent tolerability, with no notable side effects reported in the main published clinical studies.

Green lipped mussel oil or powder: which to choose?

Not all green-lipped mussel products are equal.

Most supplements use green-lipped mussel powder obtained after drying. This process causes significant loss of omega-3 fatty acids, which are particularly sensitive to heat and oxidation.

By contrast, green-lipped mussel oil extracted with supercritical CO₂ concentrates up to 15 times more omega-3 fatty acids and reaches peak blood concentration much more quickly. Its lack of proteins also improves digestive tolerability in sensitive dogs.

Glucosamine, chondroitin, collagen: popular but poorly supported

Despite their reputation, these active ingredients have not confirmed their clinical efficacy.

1. Glucosamine & chondroitin: No significant difference from placebo in the Moreau 2003 and Barbeau-Grégoire 2022 studies. Moreover, the most commonly used forms (HCl, sulphate) are poorly bioavailable (< 15%).
2. Collagen: A few positive signals, but results remain heterogeneous, often from sponsored studies. The independent Dobenecker 2024 study shows a moderate improvement not perceptible to owners.
3. MSM: Currently, there are no clinical data on MSM (methylsulfonylmethane) in dogs. Only limited evidence from human and laboratory (in vitro) studies has explored the chondroprotective potential of MSM, but these results are insufficient to demonstrate any effect in dogs.

These active ingredients are not dangerous, but their clinical interest remains marginal compared to Omega-3.

Plants and botanical extracts: limited clinical data

Many botanical extracts are offered in joint supplements for dogs: turmeric, boswellia, devil's claw and more recently CBD.

All show interesting anti-inflammatory properties, but the veterinary literature remains limited and heterogeneous. Here is what current studies say:

1. Turmeric (Curcuma longa): Used for centuries in traditional medicine, turmeric owes its action to curcumin, a polyphenol with well-documented anti-inflammatory and antioxidant effects in the laboratory. In humans, several trials have shown an improvement in joint pain, but in dogs, data remain scarce. The main limitation is its low digestive bioavailability: curcumin is poorly absorbed and rapidly eliminated. This is why only optimised forms (micelles, liposomes, or phospholipid complexes) can hope for real efficacy. In its current state, turmeric therefore remains a promising avenue, but not a clinically validated solution in dogs.
2. Devil's claw (Harpagophytum procumbens): Known as "devil's claw", this African plant contains harpagosides, active molecules capable of inhibiting COX-2 and LOX enzymes responsible for inflammation. In vitro and rodent studies confirm a reduction in joint oedema and pain markers. However, no controlled clinical trial has been conducted in dogs, which prevents any reliable conclusion on its efficacy. Well tolerated at moderate doses, it may nevertheless cause digestive upset in some sensitive animals. It should therefore be used with caution and always with veterinary guidance.
3. Boswellia (Boswellia serrata): Rich in boswellic acids, it acts as a natural anti-inflammatory by slowing the formation of leukotrienes. However, no solid veterinary study currently demonstrates an objective improvement in mobility in arthritic dogs. Its use may be considered as part of a comprehensive approach, but not as a first-line solution.
4. Cannabidiol (CBD): Extracted from hemp, it acts on the endocannabinoid system, involved in modulating pain and inflammation, but not on cartilage itself. Several studies suggest an improvement in locomotion and comfort in some arthritic dogs, but effects vary between dogs. Results also depend on extract quality (spectrum, purity) and dosage, which must be adjusted according to the dog's weight and health status and always discussed with a veterinarian, especially in cases of concurrent treatment or liver impairment. Oral CBD is not authorised for dogs in France.

Discover our guides by ingredient

Algae

Boswellia

CBD (Cannabidiol)

Collagen

Turmeric

Glucosamine-Chondroitin

Devil's claw

Antarctic krill

New Zealand green lipped mussel

MSM (Methylsulfonylmethane)

Omega-3 (EPA+DHA)

Fish oil (salmon, sardine, anchovy...)

PERNIXOL®: the only supplement rich in green lipped mussel oil

Developed by Laboratoire Sensilia, PERNIXOL® is a 100% natural liquid supplement combining:

• green-lipped mussel oil from New Zealand (source of EPA + DHA),
• and microalgae oil rich in algal DHA.

Additive-free, easy to administer and highly digestible, PERNIXOL® relies solely on natural active ingredients with clinically proven efficacy in arthritic dogs.

For owners concerned about their dog's mobility and wellbeing, choosing reliable, validated sources such as marine omega-3 fatty acids is currently the most rational strategy.

PERNIXOL®420

dogs over 20kg 420mg EPA+DHA per ml

PERNIXOL®210

dogs 10 to 20kg 210mg EPA+DHA per ml

PERNIXOL®70

dogs under 10kg 70mg EPA+DHA per ml

Conclusion

Clinical data are consistent: in arthritic dogs, marine omega-3 fatty acids (EPA and DHA) and green-lipped mussel oil remain the most effective supplements according to veterinary science for reducing inflammation and improving locomotion. The liquid form maximises absorption of these lipids and enables precise weight-based dosing, making it the most relevant format for daily use.

By contrast, glucosamine, chondroitin and collagen show heterogeneous and often non-reproducible results; they are not dangerous, but their clinical interest remains limited as a first-line option.

Botanical extracts (turmeric, devil's claw, boswellia) and CBD are complementary avenues, still insufficiently validated in dogs and to be used under veterinary supervision.

In practice, for a dog showing stiffness, lameness or discomfort during exercise, the most rational choice is a liquid supplement rich in marine omega-3 fatty acids, ideally combining New Zealand green-lipped mussel oil and microalgae oil: a safe, bioavailable approach supported by the literature. This is precisely the formulation of PERNIXOL®.

Scientific references

• Roush JK, Cross AR, Renberg WC, Dodd CE, Sixby KA, Fritsch DA, Allen TA, Jewell DE, Richardson DC, Leventhal PS, Hahn KA. Evaluation of the effects of dietary supplementation with fish oil omega-3 fatty acids on weight bearing in dogs with osteoarthritis. J Am Vet Med Assoc. 2010 Jan 1;236(1):67-73. doi: 10.2460/javma.236.1.67. PMID: 20043801.
• Magalhães TR, Lourenço AL, Gregório H, Queiroga FL. Therapeutic Effect of EPA/DHA Supplementation in Neoplastic and Non-neoplastic Companion Animal Diseases: A Systematic Review. In Vivo. 2021 May-Jun;35(3):1419-1436. doi: 10.21873/invivo.12394. Epub 2021 Apr 28. PMID: 33910819; PMCID: PMC8193331.
• Barbeau-Grégoire M, Otis C, Cournoyer A, Moreau M, Lussier B, Troncy E. A 2022 Systematic Review and Meta-Analysis of Enriched Therapeutic Diets and Nutraceuticals in Canine and Feline Osteoarthritis. International Journal of Molecular Sciences. 2022; 23(18):10384. https://doi.org/10.3390/ijms231810384
• Moreau M, Dupuis J, Bonneau NH, Desnoyers M. Clinical evaluation of a nutraceutical, carprofen and meloxicam for the treatment of dogs with osteoarthritis. Vet Rec. 2003 Mar 15;152(11):323-9. doi: 10.1136/vr.152.11.323. PMID: 12665145.
• Valentine Muller. Nutraceuticals in the management of the arthritic dog: a critical review of the literature. Veterinary medicine and animal health. 2022. dumas-03830830
• Dobenecker B, Böswald LF, Reese S, Steigmeier-Raith S, Trillig L, Oesser S, Schunck M, Meyer-Lindenberg A, Hugenberg J. The oral intake of specific Bioactive Collagen Peptides (BCP) improves gait and quality of life in canine osteoarthritis patients-A translational large animal model for a nutritional therapy option. PLoS One. 2024 Sep 19;19(9):e0308378. doi: 10.1371/journal.pone.0308378. PMID: 39298537; PMCID: PMC11412516.

This article was written by the R&D team at Laboratoire Sensilia, experts in animal nutrition.