There are many ways to nourish yourself, food is one of them.
Nourishing food is clean and full of nutrients. The more local it is, organic, pasture-raised, grown in revitalized soil, the more nutrients it will contain.
If your goal is to improve your health, reverse a disease, or prevent one, the more nutrient-dense your diet, the more resources you will be providing to your organic machine, and the less inflammation you will create. This is an excellent base which I call the Paleo Reset Diet. But it can be personalized, tweeked, or modified further: