A healthy diet consists of fruits, vegetables, whole grains and avoids processed foods and sugary drinks. A healthy diet can be met from a variety of plant and animal foods, but those who follow a vegetarian diet require non-animal sources of vitamin B-12. Nutritional guidelines are published to make people aware of healthy food intake. Some countries have made it mandatory to put nutrition facts on the packaging of processed foods, so that consumers can choose foods with health in mind.