Most dog owners assume a bag of commercial kibble covers all the nutritional bases. It seems reasonable. The label lists vitamins, minerals, protein percentages, and sometimes even a vet’s endorsement. But a growing body of research suggests that commercial dog food, even the premium stuff, often falls short in ways that affect long-term joint health, energy levels, and overall wellbeing.
Understanding those gaps is the first step toward filling them. And as veterinary science advances, the list of nutrients worth paying attention to keeps getting longer.
Commercial Dog Food Does Not Always Deliver What It Promises
A 2023 study published in Applied Sciences by Jacuńska et al. compared the nutrient profiles of commercial puppy foods with their own label claims. None of the diets studied met the manufacturer’s stated omega-6-to-omega-3 fatty acid ratio, and several had significant discrepancies between declared and measured levels of crude fat, protein, and fiber. Even owners who read labels carefully may not be getting what they think they’re paying for.
The consequences of nutritional gaps can be severe. A case series published in Veterinary Sciences by Blanco et al. documented 22 dogs that developed serious skin disease, including thick crusts, scaling, and symmetrical facial and paw lesions, solely from being fed low-quality commercial food. Once those dogs were switched to a nutritionally complete diet, lethargy resolved within one week and skin lesions healed within 15 to 30 days. Raw diets are not automatically better, either. Research published in Animals by Vecchiato et al. found that tested commercial raw pet foods often provided deficient amounts of essential nutrients, were nutritionally unbalanced, and were very high in fat.
The takeaway is that no single food format guarantees complete nutrition, and targeted supplementation can help close the gaps.
Joint Problems Start Earlier Than Most Owners Expect
Many owners associate joint issues with old age, but the data tells a different story. According to VCA Animal Hospitals, roughly 20% of dogs over one year old are affected by osteoarthritis, and the incidence can climb as high as 80% in dogs over seven. A 2024 study in Scientific Reports by Enomoto et al. found that 39.8% of young dogs aged 8 months to 4 years had radiographic signs of osteoarthritis in at least one joint, and about 23.6% had clinical OA with both radiographic evidence and joint pain. According to veterinary researcher João Alves, writing for Regenerative Medicine in 2024, OA accounts for at least 80% of lameness and joint disease cases in companion animals, and those numbers are expected to grow as obesity rates rise and dogs keep living longer.
Waiting until a dog starts limping to think about joint support is a reactive approach. Nutritional support for cartilage and synovial fluid can begin much earlier.
Look for Supplements that Combine Ingredients Like Hyaluronic Acid and MSM
Hyaluronic acid (HA) is a naturally occurring component of synovial fluid, the substance that lubricates joints. A randomized, double-blind study of 55 dogs by Serra Aguado et al., published in Animals in 2021, found that after 10 weeks of oral HA supplementation, the treatment group had a significant increase in HA concentration in their synovial fluid and a significant decrease in the osteoarthritis biomarker paraoxonase-1 compared to baseline.
Veterinary sources, including a review by Erika Caturegli, PhD, for Total Vet, also recommend combining HA with other joint-supportive ingredients like glucosamine, noting a possible synergistic effect when different chondroprotective ingredients are used together.
MSM (methylsulfonylmethane) is another ingredient frequently found in canine joint supplements. It is an organic sulfur compound associated with anti-inflammatory effects. However, as Bestie Paws notes, most evidence for MSM in animals is extrapolated from human and equine research, and studies specifically in pets remain limited. That honesty is important when evaluating supplements. Look for brands that combine well-studied ingredients rather than relying on a single compound. For example, Freedom Joint Drops from Pup Labs combine these ingredients in a liquid format designed for easier absorption.
Also Prioritize Sources of Vitamins and Minerals
Beyond joint-specific ingredients, several everyday vitamins and minerals are commonly insufficient in canine diets.
Vitamin B12 plays a crucial role in energy metabolism, red blood cell formation, neurological function, and DNA synthesis. Without enough B12, dogs may struggle to convert food into energy, leading to fatigue and lethargy. Dogs with chronic gastrointestinal disorders, IBD, or exocrine pancreatic insufficiency are at the highest risk. Even if the underlying GI problem is treated and the digestive tract returns to normal, symptoms such as vomiting, diarrhea, and weight loss may persist due the B12 deficiency rather than the initial disease.
Magnesium also deserves attention. A study by Stahlmann et al., published in Archives of Toxicology, fed immature Beagles a magnesium-deficient diet for 40 to 46 days and found distinct changes in cartilage cell structure, including swollen mitochondria and enlarged endoplasmic reticulum in chondrocytes. These are the building blocks of healthy joints, and magnesium deficiency can compromise them at a cellular level. Pup Labs includes both B12 and magnesium in its formulations, reflecting the veterinary understanding that joint health and systemic nutrition are connected.
Closing Thoughts
Not all supplements are created equal, and the pet supplement market is not regulated with the same rigor as human pharmaceuticals. Talk to your vet before starting any new supplement, particularly if your dog has existing health conditions or is on medication.
References
- Alves, J. (2024, April 22). The prevalence and treatment of osteoarthritis in companion animals. Regenerative Medicine.
- Bestie Paws. (2025, December 30). MSM (methylsulfonylmethane): Everything vets wish you knew.
- Blanco, A., López, M., Kantor, L., Duchene, A., & Ferrer, L. (2026). Dermatosis associated with feeding low-quality food (generic food dermatosis): A case series. Veterinary Sciences, 13(1),
- Caturegli, E. (n.d.). The benefits of hyaluronic acid for dogs. Total Vet.
- Enomoto, M., de Castro, N., Hash, J., et al. (2024). Prevalence of radiographic appendicular osteoarthritis and associated clinical signs in young dogs. Scientific Reports, 14, 2827.
- Jacuńska, W., Biel, W., Witkowicz, R., Maciejewska-Markiewicz, D., & Piątkowska, E. (2023). Comparison of key nutrient content of commercial puppy foods with canine dietary requirements. Applied Sciences, 13(21), 11791.
- Serra Aguado, C. I., Ramos-Plá, J. J., Soler, C., Segarra, S., Moratalla, V., & Redondo, J. I. (2021). Effects of oral hyaluronic acid administration in dogs following tibial tuberosity advancement surgery for cranial cruciate ligament injury. Animals, 11(5), 1264.
- Stahlmann, R., Kühner, S., Shakibaei, M., Flores, J., Vormann, J., & van Sickle, D. C. (2000). Effects of magnesium deficiency on joint cartilage in immature beagle dogs: Immunohistochemistry, electron microscopy, and mineral concentrations. Archives of Toxicology, 73(10-11), 573–580.
- VCA Animal Hospitals. (n.d.). Arthritis in dogs.
- Vecchiato, C. G., Schwaiger, K., Biagi, G., & Dobenecker, B. (2022). From nutritional adequacy to hygiene quality: A detailed assessment of commercial raw pet-food for dogs and cats. Animals, 12(18), 2395.
