Dr. Clark is one of the OGs in the space. She's passed away I believe but her son still runs the store.
Herbs come with a booklet with her protocols. I believe they are the only one using freeze dried young (green) black walnut, which is supposed to drastically improve efficacy.
I think using this to cleanse the GI tract is a great starting project.
https://naturalhealthsupply.com/shop/herbal-cleanses/herbal-parasite-cleanse/