Quote:
There is no reliable evidence that corydalis or its constituents offer any medicinal benefits. Corydalis contains a number of active and potentially dangerous chemicals in the alkaloid family, including tetrahydropalmatine (THP), corydaline, protopine, tetrahydrocoptisine, tetrahydrocolumbamine, and corybulbine. Of these, THP may be the most active, as well as the most toxic (see Safety Issues ).
http://www.med.nyu.edu/content?ChunkIID=104681
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I can't find enough credible information about this supplement to say with any confidence that I think it can't hurt to try it.
There has been one study (done on rodents) of a compound—Dehydrocorybulbine (DHCB)—derived from the plant that has shown some promise, but that is still a long way off.
See also:
Pain-relieving compound found in traditional chinese treatment
Doc