Purchase a one pound package of Raintree's sustainably harvested pure Cat's claw vine bark powder - rich in active and beneficial phytochemicals that occur naturally in this plant. 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.* Based on independent assays, Raintree's cat's claw has the highest alkaloid content of any other available, assaying in a range of 1.2% to 1.58%. This plant has been milled into a fine powder which is suitable to stuff into capsules or to prepare your own teas, tinctures or extracts.