Seven of the 18 herbs reviewed had evidence for in-vitro activity against B. burgdorferi. These compounds included: (1) cat’s claw,5 (2) cryptolepis,5 (3) Chinese skullcap,5 (4) Japanese knotweed,5 (5) sweet wormwood,5 (6) thyme,5,13 and (7) oil of oregano.