White Willow Bark for Anti-Inflammatory

Research suggests that white willow bark extract has anti-inflammatory properties supported by a modest body of evidence, with in vitro and animal studies indicating it works by suppressing inflammatory mediators such as TNF-α, NF-κB, and IL-1β, and that its effects appear to stem from a combination of salicylates, polyphenols, and flavonoids rather than salicin alone. A 2018 animal study found that white willow bark, particularly in combination with other botanicals, reduced paw swelling and inflammatory gene expression in a rat model of arthritis, while a 2015 review of clinical literature found limited but positive human evidence for its use in chronic lower back pain, joint pain, and osteoarthritis. A small randomized controlled trial found that a multi-ingredient supplement containing white willow bark reduced self-reported joint pain significantly more than placebo, though it produced no measurable changes in inflammatory biomarkers or physical performance, making it difficult to isolate white willow bark's specific contribution. Overall, the evidence base remains limited by small sample sizes, multi-ingredient formulations that complicate attribution, and a reliance on animal models, and individuals sensitive to salicylates should be aware of potential allergic reactions.