Chondroitin sulfate
Chondroitin sulfate is often studied alongside other ingredients. A positive result for a combination does not establish an independent effect.
Health Topic Joint and Mobility
Glucosamine
Glucosamine commonly appears in joint supplements, but results from multi-ingredient products cannot establish what glucosamine alone does.
Glucosamine and chondroitin for canine arthritis: a controlled trial
Improvement was reported, but the design does not establish the isolated effect of either glucosamine or chondroitin.
Green-lipped mussel
Green-lipped mussel in dog joint supplements: what the research shows, why powders and extracts differ, and what to check on a product label.
Green-lipped mussel extract for dogs with joint disease
More dogs improved with the tested extract after eight weeks, but the overall clinical-score comparison did not reach the usual statistical threshold.
Fish oil
Fish oil, EPA and DHA explained, with dog arthritis research, limits of the evidence and questions to ask before choosing a supplement.
Fish-oil-enriched food and weight bearing in dogs with arthritis
A fish-oil-enriched food showed a promising movement result in dogs with arthritis, but owner assessments did not show a treatment difference. The analysis excluded six dogs who did not finish.