Understanding the science behind food and nutrition is an important part of making healthy food choices and keeping yourself fit, but it can also help you to see the big picture when it comes to health and food. Find out about the science of nutrition, including how your body takes in vitamins and nutrients from the food you eat and how a healthy diet keeps you in shape Discover the history of our understanding of healthy eating and how things have changed over the years. Learn about the connection between food and science and how a nutritious diet helps to keep you healthy as you grow older.