Sweet potato is a source of mannitol, a sugar alcohol so should be limited to 1/2 cup serving. I would imagine since sweet potato is not the main ingredient that a serving of the Food should taste good, Sweet potato chips would be fine. Evap. can juice is another name for sucrose (table sugar) which may be processed slightly different. You don’t want to go overboard with sugary foods in general, but a portion size of something made with Evap cane juice should be fine–at least from what we know at this point. Still more research to be done. 🙂