This list of 10 harmful foods Hashimoto's patients should avoid will help you to feel better and treat your Hashimoto's the all-natural way through diet. Yes, it is possible to both treat and manage your Hashimoto's by altering the foods that you put into your mouth. This guide will walk you through what I believe are the most dangerous foods that Hashimoto's patients can consume and they should be avoided 100% if you are serious about treating your Hashimoto's naturally.