Posted 5/6/2020 5:30 PM (GMT -5)
Woodduck - I would say to do your own research on each herb because each has different compounds, etc... Also, while I am so appreciative of Buhner and his work, I do think he understates some of the risks/issues with some herbs. You can google herb + kidney or liver toxicity, for example, and see what comes up.
(I had liver damage a couple of years back which I am almost 100% positive was from Chinese Skullcap in Buhner's core Lyme protocol. He had no mention of potential liver issues in the book but there were plenty of reports online. Ever since then, I've been wary of relying on his books alone).
In this case, I'm pretty sure JK and Houtt are supposed to be fine long-term from my own research. I think I saw somewhere at some point that Cryptolepis might be bad for the kidneys at higher doses long-term but I can't remember.