Phytonutrients are plant compounds that aren't vitamins or minerals. Your gut bacteria convert them into active molecules that signal between your gut and brain, which may explain why they matter for health.
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Can you talk about what phytonutrients are and why? They're a very important part for people to be thinking about when it comes to their nutrition. Phytonutrients are nutrients from plants that are not caloric, so they don't give you energy in the way of calories. And they are also not a vitamin, they're not a mineral, they're not a protein, carbohydrate or fat. They are unique compounds from the plants exclusively, and there are thousands of them. And what we know about phytonutrients is that they're doing lots of different things in the body. They're controlling stress response at the level of the cell. So much of the gut microbiome is metabolizing these different phytonutrients and then creating other more active compounds for the body that can then communicate between the gut and the brain.