Existence is coexistence.
Plants are a part of the ecosystem and process minerals to imbibe nutritional value for the other species.
If you understand the full cycle what animals and human being excrete gets converted back into minerals.
In nature everything is in order and recycyled. Nothing is created and nothing is destroyed.
Identifying what is good for your body can be very simple if you look at things holistically and not by the people who have a profit centered vested interest in the product.
We do not need any modern processing and eating whole foods as per the philosophy of coexistence can work wonders.
www.foodrevolution.org is a great effort for universal well being by the owner of the famous icecream brand Baskin Robbins who left the whole empire for better health.
The purpose of food is to nourish the body. Nothing less than this will suffice nothing more than this is needed. The natural way of coexistence is that simple. The human race has erred and now can correct the course and work its way to a healthy lifestyle by eating the right food.