Health & longevity through the healing power of nature - that s what it means to Trust the Leaf®. Devils Claw Extract is standardized to 1.5% harpagoside . It is traditionally used as a tonic for joints. Satisfaction Guaranteed. Freshness & safety sealed with printed outer shrinkwrap and printed inner seal. Do not use if either seal is broken or missing. Questions? Call 1-800-9Nature or visit naturesway.com. Our Devil s Claw extract is carefully tested and produced to certified quality standards.