Some of the active ingredients documented and researched in cat's claw are 6 oxindole alkaloids. These alkaloids have been documented worldwide by independent research and patented to nutritionally support the Defense mechanism of body.* Is this a "TOA-Free" product? No! The main TOA alkaloid, isorhynchophylline, has been documented and patented to increase immune function (phagocytosis).

Cat's claw (U. tomentosa) is a large, woody vine that derives its name from hook-like thorns that grow along the vine and resemble the claws of a cat. More information about Cats Claw Capsules

• Cat's claw has been clinically documented with immunostimulant effects and is contraindicated before or following any organ or bone marrow transplant or skin graft.
• Cat's claw has been documented with antifertility properties and is contraindicated in persons seeking to get pregnant (this effect however has not been proven to be sufficient to be used as a contraceptive and should not be relied on for such).
• Cat's claw has been documented with chemicals which can reduce platelet aggregation and thin the blood. Check with your doctor first if you are taking coumadin or other blood thinning drugs and discontinue use one week to ten days prior to any major surgical procedure.