Evidence-Based Joint Help Worth Trying for Your Dog

Good News: There’s a Lot You Can Do

Walk into any pet store, and you’ll find a wall of joint supplements. Some have promising research behind them, and knowing which ones lets you spend wisely.

A recent review on managing osteoarthritis (OA) in adult dogs gave me a useful way to sort them.¹ I’m not asking you to choose between natural support and your veterinarian’s pain medication. NSAIDs remain a predictable option for most arthritic dogs. Adding fresh, anti-inflammatory foods, supplements, and joint-supporting therapies is backed by solid science. Here are the ones I’d look at first.

First, the Free One That Beats Every Bottle

The review concludes that maintaining an ideal body condition has the strongest evidence for long-term protection against OA progression. Extra fat is inflammatory tissue that also loads every joint, so every pound your dog trims helps.

Movement is medicine in dogs with hip dysplasia. Those that walked more than 60 minutes a day had less severe lameness than those that walked less than 20. Consistent, low-impact activity is part of the treatment.

Proper Balance of Omega-3 to Omega-6 Fatty Acids

A proper balance of omega-3 to omega-6 fatty acids is essential. Excess omega-6 without sufficient omega-3 can promote chronic inflammation, but omega-6s alone aren't inherently pro-inflammatory; inflammation ramps up when DHA and EPA are lacking.

Omega-6s are abundant in commercial pet foods, compared to EPA and DHA, which are intentionally missing or kept low in shelf-stable food products because they’re hard to stabilize and are prone to oxidation and rancidity. Annoyingly, AAFCO doesn’t recommend that pet food manufacturers encourage owners to add the deficient EPA and DHA at the time of feeding, so pets eating unsupplemented commercial pet food are all deficient in DHA and EPA.

Peer-reviewed studies show that supplementing pets with pre-formed EPA and DHA from marine (ocean) sources improves joint comfort and quality of life. A randomized 16-week trial using marine-derived EPA and DHA (about 70 mg/kg total) increased omega-3 index levels and reduced pain scores in small- and medium-sized dogs.²

In a randomized, double-blind trial, researchers fed 38 dogs with osteoarthritis either a typical commercial food or a food containing 3.5% fish oil omega-3 fatty acids.³ After 90 days, peak vertical force, a measure of how much weight a dog puts on the sore limb, rose 5.6% in the omega-3 group versus 0.4% in controls.

Green-Lipped Mussel: A Helpful Ally

New Zealand green-lipped mussel (GLM) provides omega-3s and other compounds that support joints. In a randomized, double-blind trial of 45 dogs, each group received mussel extract, the NSAID carprofen, or placebo for 8 weeks. Mussel significantly improved veterinary-assessed mobility and pain scores compared with placebo, and owners of dogs given mussels were less likely to need extra carprofen at week 8 (7%) than owners of placebo dogs (27%).⁴

GLM is a natural fit for dogs that don’t tolerate NSAIDs and for guardians who want a complementary layer alongside anti-inflammatory medication.

UC-II Collagen: The Standout Contender

Undenatured type II collagen works differently from the rest. The idea is that small daily amounts help the immune system become tolerant of collagen fragments in the joint, calming the response that drives inflammation.

In an early trial of 15 obese arthritic dogs, those given 10 mg a day for 90 days had less pain and lameness and became more active. Benefits tracked with use, suggesting consistency is key.⁵

A 2020 review of UC-II in companion animals adds to the good news. In a 120-day study of 20 arthritic dogs, 10 mg of UC-II a day beat glucosamine and chondroitin, with reported reductions of up to 62% in overall pain, 91% in pain on limb manipulation, and 78% in exercise-related lameness. In a 30-day trial of 60 dogs, UC-II improved mobility scores about as much as the NSAID robenacoxib (32.7% versus 31.5%). It is also well tolerated, with minimal to no side effects.⁶

Curcumin: A Promising Partner

Curcumin, the active compound in turmeric, is one of the most popular natural anti-inflammatories for arthritic dogs, and the early research is encouraging. In a randomized, double-blind, placebo-controlled trial, 42 dogs with osteoarthritis completed 3 months on a diet supplemented with a phosphatidylcholine-complexed curcuma extract, hydrolyzed collagen, and green tea extract.⁷ Pain on limb manipulation fell significantly in the supplemented group, owner-rated pain stayed stable in that group while worsening in the placebo group, and the ability to rise from lying down improved more. The diet was well tolerated. Look for a bioavailable form of curcumin, and judge it by your dog’s comfort over a couple of months.

Eggshell Membrane: A Fascinating Lab Finding

Eggshell membrane is the thin layer between the shell and the egg white. It contains collagen, glucosamine, glycosaminoglycans, elastin, and hyaluronic acid, which is why it appears in so many joint formulas.

A recent laboratory study offers a glimpse into how it might work. Researchers exposed canine cartilage cells to IL-1β, an inflammatory signal that drives joint breakdown, and then tested a hydrolyzed eggshell membrane peptide preparation. The peptides reversed the rise in IL-6, nitric oxide, and PGE2, the same pain-and-inflammation messengers that NSAIDs target. They reduced MMP-13, a cartilage-degrading enzyme that IL-1β had increased roughly 100-fold, and restored collagen type II and aggrecan, two building blocks of healthy cartilage. They also reduced NF-κB, a master inflammation switch, moving into the cell nucleus, and kept cells healthy at every dose tested.⁸

CBD and Krill Oil: A Biscuit That Helped in a Blinded Trial

Cannabidiol (CBD), a non-intoxicating compound from hemp, works with the endocannabinoid system, which helps regulate pain signaling.⁹ A double-blind, randomized, controlled trial tested it alongside krill oil, a marine source of EPA and DHA omega-3s, in 30 dogs with chronic stifle (knee) osteoarthritis. The dogs were Pomeranians, Chihuahuas, Golden Retrievers, and Welsh Corgis.

They were randomly assigned to a plain placebo biscuit, a biscuit with 2.5% krill oil, or a biscuit with 2.5% krill oil plus 2.5% full-spectrum CBD oil (about 5 mg of CBD per gram). Owners tracked pain with the Canine Brief Pain Inventory.

The results were encouraging:

• Both supplement groups improved. Pain interference and pain severity scores improved significantly after about two weeks.
• The CBD and krill oil group had the best scores, ahead of both the placebo and krill oil groups.
• Dogs on placebo were the ones whose pain worsened. Three were removed from the study because their lameness and pain worsened.
• No side effects were observed in the CBD and krill oil group.

The review also describes CBD-rich hemp products as promising for OA pain, and suggests choosing a product with positive clinical trial evidence in dogs.

Fresh Food: Early Signals Worth Watching

One of the questions I hear most is whether fresh food can help reduce inflammation. In a year-long study of 22 senior sled dogs, those on a fresh human-grade diet showed lower advanced glycation end products (AGEs, compounds linked to aging and chronic disease), better antioxidant profiles, and higher long-chain omega-3s than dogs on kibble.¹⁰ In a comparison of 55 healthy dogs fed raw or kibble, raw-fed dogs showed more gut immune activity, even though blood inflammation markers were similar.¹¹ A complete, balanced fresh diet that provides ample meat-based protein, keeps your dog lean and provides plenty of marine omega-3s fits well with everything else in this plan.

And don’t forget to evaluate treats: starchy, ultra-processed biscuits add extra calories and can spike blood sugar, while excess calories can promote weight gain and chronic inflammation. Choose antioxidant-rich fresh fruits and veggies instead, or meat-based treats, and count them toward your dog’s daily calorie intake.

Rehab Therapies to Explore

PEMF (pulsed electromagnetic field therapy). In a randomized, placebo-controlled trial of 21 dogs, gait symmetry improved significantly in the PEMF group by day 42, and the authors concluded it was safe and helpful.¹²

Photobiomodulation (cold laser). A 17-dog study reported improved pain scores over 6 weeks, and analgesics were reduced in 13 of 17 dogs.¹³

Acupuncture. In a placebo-controlled, blinded crossover trial of 36 dogs, owners reported significantly more improvement with acupuncture than with placebo¹⁴.

How I’d Put It Together

If I had an arthritic dog in front of me, I’d build a treatment plan in layers:

1. Reach ideal body weight and stay there. Nothing else comes close.
2. Move every day. Short, steady walks, if your pup hasn’t been moving regularly.
3. Make the home easier. Add rugs for traction, ramps instead of stairs, raised bowls, and trimmed nails.
4. Add marine omega-3s
5. Feed a complete and balanced fresh, whole-food diet that fits your family routine and budget to keep the diet clean, lean and balanced.
6. Consider UC-II, green-lipped mussel, a bioavailable curcumin blend, hydrolyzed eggshell membrane, or a veterinarian-guided CBD product as add-ons, and give them at least a couple of months.
7. Explore rehab therapy such as PEMF, laser, and acupuncture,
8. Keep your veterinarian on your team. Medication is needed, in some cases, and it can work well alongside everything above.

Pain is measurable. Ask your veterinarian about validated owner questionnaires such as the Canine Brief Pain Inventory, and re-check every few months. The best pain management plan is evidence-based, tailored to your dog, and reviewed regularly.

Sources and References:

• ¹ Marcellin-Little DJ, Hulse DA, Huntingford JL, Grubb T, Brunke MW, Pechette Markley A, Frank B. A proposed framework for practical multimodal management of osteoarthritis in growing dogs. Front Vet Sci. 2025 Apr 28;12:1565922.
• ² Carlisle C, Metzger BT, Tintle NL, Polley K, Jackson KH, Le Brun-Blashka S, Griffiths J, Harris WS. The Effects of Omega-3 Supplementation on the Omega-3 Index and Quality of Life and Pain Scores in Dogs. Animals (Basel). 2024 Oct 29;14(21):3108. doi: 10.3390/ani14213108. PMID: 39518831; PMCID: PMC11545626.
• ³ Roush JK, Cross AR, Renberg WC, et al. 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;236(1):67-73.
• ⁴ Hielm-Björkman A, Tulamo RM, Salonen H, Raekallio M. Evaluating Complementary Therapies for Canine Osteoarthritis Part I: Green-lipped Mussel (Perna canaliculus). Evid Based Complement Alternat Med. 2009 Sep;6(3):365-73. doi: 10.1093/ecam/nem136. Epub 2007 Oct 29. PMID: 18955269; PMCID: PMC2722199.
• ⁵ Deparle LA, Gupta RC, Canerdy TD, Goad JT, D'Altilio M, Bagchi M, Bagchi D. Efficacy and safety of glycosylated undenatured type-II collagen (UC-II) in therapy of arthritic dogs. J Vet Pharmacol Ther. 2005 Aug;28(4):385-90. doi: 10.1111/j.1365-2885.2005.00668.x. PMID: 16050819.
• ⁶ Gencoglu, H.; Orhan, C.; Sahin, E.; Sahin, K. Undenatured Type II Collagen (UC-II) in Joint Health and Disease: A Review on the Current Knowledge of Companion Animals. Animals 2020, 10, 697. https://doi.org/10.3390/ani10040697
• ⁷ Comblain, F., Barthélémy, N., Lefèbvre, M. et al. A randomized, double-blind, prospective, placebo-controlled study of the efficacy of a diet supplemented with curcuminoids extract, hydrolyzed collagen and green tea extract in owner’s dogs with osteoarthritis. BMC Vet Res 13, 395 (2017). https://doi.org/10.1186/s12917-017-1317-8
• ⁸ Mao X, Xu L, Cao Y, Wang M, Wang W. Eggshell membrane peptides alleviate IL-1β-induced inflammatory responses and extracellular matrix degradation in canine chondrocytes by inhibiting the NF-κB signaling pathway. Animals (Basel). 2026;16(13):1939. https://doi.org/10.3390/ani16131939
• ⁹ Soontornvipart K, Wongsirichatchai P, Phongphuwanan A, Chatdarong K, Vimolmangkang S. Cannabidiol plus krill oil supplementation improves chronic stifle osteoarthritis in dogs: a double-blind randomized controlled trial. Vet J. 2024;308:106227. https://doi.org/10.1016/j.tvjl.2024.106227
• ¹⁰ Yamka R, Sires R, Wakshlag J, Huson HJ. Serum Metabolomics of Senior Dogs Fed a Fresh, Human-Grade Food or an Extruded Kibble Diet. Metabolites. 2025 Oct 17;15(10):676. doi: 10.3390/metabo15100676. PMID: 41149653; PMCID: PMC12566208.
• ¹¹ Hiney K, Sypniewski L, DeSilva U, et al. Fecal microbiota composition, serum metabolomics, and markers of inflammation in dogs fed a raw meat-based diet compared to those on a kibble diet. Front Vet Sci. 2024;11.
• ¹² Šutalo S, Klasen L, Tichy A, Harms O. Influence of pulsed electromagnetic field (PEMF) therapy on osteoarthritis in dogs. BMC Vet Res. 2025 Oct 3;21(1):573. doi: 10.1186/s12917-025-05036-9. PMID: 41044566; PMCID: PMC12492814.
• ¹³ Barale L, Monticelli P, Raviola M, Adami C. Preliminary clinical experience of low-level laser therapy for the treatment of canine osteoarthritis-associated pain: A retrospective investigation on 17 dogs. Open Vet J. 2020 Apr;10(1):116-119. doi: 10.4314/ovj.v10i1.16. Epub 2020 Mar 30. PMID: 32426264; PMCID: PMC7193873.
• ¹⁴ Baker-Meuten, A., Wendland, T., Shamir, S.K. et al. Evaluation of acupuncture for the treatment of pain associated with naturally-occurring osteoarthritis in dogs: a prospective, randomized, placebo-controlled, blinded clinical trial. BMC Vet Res 16, 357 (2020).

About Karen Shaw Becker, DVM, CVH, CVA, CCRT

Veterinarian Dr. Karen Shaw Becker believes biologically appropriate food and an animal's immediate environment are essential in determining health, vitality, and lifespan. She has spent her career as a wildlife and exotic animal veterinarian and small animal clinician, empowering animal guardians to make intentional lifestyle decisions to enhance the well-being of their animals.