News by Matt Young  Genetic testing has become popular thanks to ancestry websites, but a new wave of testing is now helping us understand our bodies like never before. Including why we could be so tired. Most of us rely on doctor s visits and medical tests to understand how our bodies function, but advancements in DNA testing is now providing a simple way to find out a host of things such as how we store fat, how our muscles are wired and how our body processes vitamins. So when myDNA sent me a test kit, I must admit, I was intrigued.