The food you eat is the source of energy and nutrition for your body. Eating should be a pleasurable experience, not one that causes guilt or remorse. Getting enough food is rarely a problem, but getting enough good nutrition can be a challenge. What should you eat to stay healthy? Nearly everyone has an opinion, from your best friend to the daily newscaster. There is a lot of advice available, but the basics for good health have not changed since the first fad diets were introduced centuries ago.