The type of food that a body processes can have a huge positive effect on the functions of the brain; when the gut is healthy, the brain is happier. Certain microbes found in the gut can help heal and protect the brain in the long-term, so it’s important to nurture these with good food. A diet filled with filled with processed, sugary foods allows bad bacteria in the gut to grow exponentially, and thus impairs brain health as a result. Poor diet has been linked to mental health issues ranging from headaches and ADHD to depression and dementia.