When it comes to food and drinks, caffeine usually makes my stutter worse. A few days ago I drank a cup of coffee before a phone interview and it didn't go well because I was getting stuck on every other word I was trying to say. A week before I had a phone interview for another job, but had little problems answering the interviewer's questions because I hadn't drank coffee that day. Then again, I feel that there is more than just diet that goes into the causes of stuttering, so I can't be 100% sure when I say that caffeine had a role in worsening my stuttering. Anyway, awesome work with the tour you gave! Keep it up :)