Cat's Claw (Uncaria) for Joint Health

Research suggests mixed and inconclusive findings for cat's claw in supporting joint health, based on the available published evidence. One randomized, double-blind, placebo-controlled trial examined a cat's claw extract (vincaria) combined with a mineral supplement in patients with mild to moderate knee osteoarthritis, finding that while the treatment groups showed faster early symptom relief compared to placebo, overall differences at eight weeks were not statistically significant. Studies indicate that interpretation of these results is complicated by methodological limitations, including the widespread use of rescue pain medication during the trial, which researchers noted may have obscured potential benefits. Given that the current evidence base consists of only a single RCT with mixed outcomes, no firm conclusions can be drawn about cat's claw's effectiveness for joint health, and further well-controlled research would be needed to clarify its role.