Food is the primary source of energy and nutrition for both humans and animals. Generally, it is composed of protein, fat, vitamins, and minerals. It is necessary for the growth of the body, the repair of tissues, and the regulation of vital processes.
Historically, human societies secured food by gathering and agriculture. But in recent times, improved transportation and trade have made more types of foods available.
People’s diets vary from country to country and also within a single country. However, they are shaped by geography, culture, belief systems, and social structures.
In developed nations, people generally eat nutritious and healthful foods. But in developing countries, malnutrition is more common.
One of the major causes of famine is a drought. This can be a result of a poor harvest or a flood. Some of the main food sources for many people are fish and poultry. Fish are good sources of vitamins and minerals. The proteins contained in eggs and meat are also useful for the body.
In addition, there are many grains, which are the raw materials used to make ready-to-eat foods. Grains contain carbohydrates and dietary fiber. Various grain products have different textures, shelf lives, and nutrient content.
Grain-based products include cereals, breads, pasta, tortillas, and rice. Whole grains are rich in fiber and iron.
Vegetables are also an important part of a healthy diet. Vegetables provide a variety of colors, flavors, and nutrients. They can be eaten fresh or canned.