I get that but for me I've eaten healthy as I I've been training for over 15 years now and many healthy foods have no affect on my stutter other than cold fruits sometimes make it worse especially oranges. But almonds mainly and boiled eggs are my my two go to foods that I know usually improve my stutter especially on my bad days obviously they are no cure. I got this taught to me from childhood from my uncle who had a very bad stutter as a kid and he told me about this. I just wanted to share what helps me hopefully it can help someone else. Also someone mentioned coffee I have heard that from someone else too but I can't tell if it affects me or not. I think for me it mainly comes down to warm and cold foods that either warm me from inside or make me feel cold