Prions do not exist, and nobody has ever PROVED they do.

Chitin is what kills brain cells

Pick a random disease. Research that name + chitin. You will ALWAYS find that Chit-3-like1 or YKL-40 or Chitotriosidase is present at the site of disease.

Why? Because these are chitin enzymes, trying to destroy the chitin that is causing the disease. All diseases are caused by chitin