What Is Food?
Food is any substance consumed by an organism for nutritional support.food It generally contains essential nutrients such as carbohydrates, fats, proteins and vitamins. Different organisms have evolved to eat specific foods, to satisfy their energy needs and encourage growth. Food is produced in a number of ways, and is obtained from plants, animals, or microorganisms. It may be cooked or uncooked, and can be eaten or drunk as a beverage. It can also be used as a source of fuel or energy, to build tissue or protect organs, or as a means of transportation.
From a regulatory perspective, the definition of food in Australian Food Law is quite broad, covering anything intended for human consumption or offered for sale to humans. The legislation specifies that this includes animal food, plant food, raw or partly prepared food, as well as chewing gum.
The food industry has a major impact on economics, culture, and the environment. Several major global concerns are linked to the food supply, including the need to produce enough nutritious food for a growing population, the need to protect biodiversity, and the impact of climate change on farming and food production.
In general, people should eat a balanced diet containing vegetables, fruits, whole grains, lean meats, fish and healthy low-fat dairy. They should drink plenty of water and limit salty food, sugary drinks, alcohol and fatty foods.
A healthy diet also includes protein-rich foods such as beans, lentils and nuts. The body uses protein to build and repair cells, tissues and muscles, as well as for enzymes, hormones and blood plasma. Proteins also provide energy, and are needed to absorb fats, vitamins and minerals from other foods.
Fats provide more than twice as much energy as carbohydrates. They also help to insulate and protect the body, as well as to transport vitamins and minerals. Most fats come from animal products, but some are found in vegetable oils.
When eating out, it's important to choose dishes that are low in fat and sodium (salt). Look for meals that are baked, broiled or grilled rather than fried. Choose vegetable-based entrees and side dishes, and avoid fatty sauces and gravies. If portions are large, ask for a doggie bag and take home one-third to half of the meal. You can also ask restaurants to make substitutions on your plate if desired. If you eat meat, choose chicken, fish or lean beef. If you eat dairy, opt for lower-fat milk and cheeses. Ideally, you should try to eat at least some foods that are organic or locally grown. These foods are usually less processed and have fewer additives than their non-organic counterparts. They may cost a bit more, but they are good for the environment and your health. For example, organic apples and pears are less likely to be genetically modified than conventional ones. They are also more nutritious.