By learning the core principle of any philosophy, you can adapt your own unique program based on it. To do this here, explore each part of the tree. Find a few things in each category that you like, then start eating them! This list is by no means exhausted. Once you start looking at your food in this way, you'll undoubtedly find new foods to enjoy. I mean, how many edible roots, seeds, berries, etc. are there? This philosophy acts as a food filter as well. Because if it's not a root, seed, berry, etc. then you don't eat it, thus avoiding most toxins. That said, the Tree A Day goal can also boost a poor diet, just be mindful of the potential for food allergies when trying new things.