Chemotherapy is one of the most popular cancer treatments, but it’s also known for its many side-effects. Eighty percent of those using common chemo drug Taxol have to deal with peripheral neuropathy, a kind of nerve pain that can persist throughout a lifetime. But Johns Hopkins researchers have found one particular chemical that seems to prevent the nerve degeneration that causes peripheral neuropathy. And that chemical is a popular dog food additive called Ethoxyquin.