A lot of information on the topic is controversial. What isn't seems to be:

1) Eat lots of vegetables. 2) Don't eat in a way that produces sudden spikes in the blood glucose level. That means complex carbohydrates are usually better than simple sugars.

Being mindful of your own state and how it's affected by foot yields return. Personally I quit certain foods that I ate regularly after I payed attention to how I feel after I eat them.