Hi @frogy68, welcome to Connect. I'm not sure if this is the study that @maryz was referring to but it does sound like it could be. It's from 2013. I also take turmeric for other autoimmune conditions.

Turmeric - A new treatment option for lichen planus: A pilot study
-- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3961895/