The glucosamine-chondroitin market is a $1.3 billion industry with remarkably thin clinical evidence behind most retail products. In a 2024 meta-analysis of 34 randomized controlled trials, fewer than a third of over-the-counter joint supplements contained the stated active ingredient concentration at the time of purchase.
What actually works — and what your vet is quietly recommending instead — comes down to three variables most pet parents have never been told to check. First: bioavailability form (not all glucosamine is created equal). Second: the presence of EPA and DHA as co-factors. Third: whether the product carries NASC (National Animal Supplement Council) quality certification.
“The supplement your vet is quietly recommending isn’t the one on the end-cap at the pet store.”
The full breakdown — including the three brands our veterinary panel tested and the one that passed — is in the complete issue. Every recommendation is sourced to peer-reviewed literature.
