Food is a substance used by living organisms to sustain life and provide energy. It is obtained by plants through photosynthesis and by animals from other organisms or by direct absorption from the air or water. The nutrients in food are absorbed by the digestive system and used by the body. The quality of food and the way it is prepared affects health.
A person’s eating habits can be influenced by culture, religion, family and social customs. Food is also a source of pleasure and can be served at special occasions, such as holidays and weddings. People from different cultures have unique food traditions, such as preparing and serving dumplings in China or drizzling maple syrup on Canadian pancakes.
The types of food people eat vary greatly from one country to another and even within a single region, depending on climate, availability of water and land, and cultural factors. Traditional foods include wild game, fish and shellfish, vegetables, legumes, whole grains and fruits. In modern times, however, more processed foods are available. These may contain added sugars, fats and salt to improve taste and texture. They may be packaged and easy to store or cook, but they generally lack the fiber of whole foods.
Eating a variety of foods is important for good health. Most adults need about five to six servings of each type of food per day. When selecting foods, choose those that are low in saturated and trans fats, high in fiber and potassium, and rich in vitamins and minerals.
Carbohydrates are an important fuel for the body. They are a source of energy for the body’s cells and are found in many foods, such as fruit, starches and vegetables. The body also gets some of its energy from fats, which are found in meat and dairy products.
A diet that is low in saturated and trans fats, carbohydrates, and fiber can help reduce the risk of heart disease. It is important to eat a variety of foods, including lean proteins, fruits and vegetables, whole grains, and low-fat dairy.
It is important to eat slowly and to stop when you feel full. Eating too quickly can lead to overeating and may cause you to eat more than you need. It is also a good idea to eat with other people. This can help you eat less and enjoy your food more.
The purpose of food is to nourish people fairly and equitably while respecting the people who produce and prepare it, the land from which it comes, and the environment. The United States Department of Agriculture (USDA) has adopted this definition as its guiding principle for food policy.