Book excerpt: This guide is a summary of the original book, "Brain Maker: The Power of Gut Microbes to Heal and Protect Your Brain - for Life", by Dr. David Perlmutter. The purpose to help you understand and practice the ideas described in the book. It includes: * A compact summary of the original book. The summary will help you understand the key ideas and recommendations. It helps you master the concept while offering a rapid refresher when you need it most. Use it to keep the topic relevant and in front of you for times you fall off track. It'll save you precious time rereading the book to reabsorb, remember and recategorize. We did the work for you. * Online Materials. These are extra learning materials such as on-demand replay of public lectures, and seminars on the topics covered in the chapter. They help reinforce your understanding of the ideas and make them easier to put to practice. This guide is for you if you: * Value time spent on EXECUTION, not reading * Want to understand the key ideas of the book quickly * Want a rapid refresher when needed This study guide is more than a book summary: use it as a supplement to the book to make the ideas easier to understand and put to practice.