This book will walk the readers through the fundamentals of food and its metabolism. Readers will understand how food is metabolized and how the nutrients are absorbed and what happens when unnatural and processed food is consumed. We also talk about the role of our DNA and Gut Biome in maintaining body’s balance and how this knowledge can lead to customization of our food to fit our needs. This book is written for lay readers who want to understand the concept of using “ Food as Medicine”. Such an approach can have profound impact on one’s health and well-being.