@gba, I think you are referring to the Foundation for Peripheral Neuropathy (https://www.foundationforpn.org/) but I don't think it's a study. It's list they compiled based on input from members of the foundation who have neuropathy. Here's the document: https://www.foundationforpn.org/wp-content/uploads/2020/08/Complementary-and-Alternative-Treatments-Revised-2020-final.-1.pdf