In this new book, superstar Hollywood actress and former model Diaz shares her advice on how to live a happier, healthier and stronger life. As a young woman, Diaz had no idea that the decisions she was making about what to eat and how to exercise would have an impact on her health for years to come, and here she offers a simple guide to feeling great and looking amazing. Informed by science, it's aimed at women from their teens to their 30s and up.