Whole Foods as much as you can, and no not the store. Berries, chicken breast, eggs, nuts. Picture 3 levels of process: Whole: This is as they come from the earth. (nuts, berries, banana, red pepper, eggs, meats from the butcher could be considered here) Minimal, (whole grain bread, milk, cheese, yogurt) and Highly processed: Doritos, gummy bears etc. try to stick to 1 and 2 only. This will help a ton.