Using organic produce in the process of healing the body is essential. Reducing toxic load in all forms is a primary aim so as to reduce the load on one's immune system allowing it to activate the body's own healing mechanism. It should go without saying but eat less processed foods and more wholesome foods! This means reading labels. The fewer ingredients the better, and if you see chemical additives, preservatives, artificial colors or flavors (usually represented by numbers) leave it on the shelf or as David Wolfe says "use it as a house brick".