Nutrition is the physiological process of acquiring energy from food sources for growth and metabolic activities. The body starts absorbing these nutrients as digestion begins.
Typically, there are two major categories of nutrients, namely micronutrients and macronutrients.
The micronutrients, such as calcium, iron, vitamins, etc., fall under this category. These nutrients extend components required for the metabolic activity of the body. They also repair and build the damaged tissues to support the organs.
Macronutrients are the crucial energy source in the body, which is produced by breaking down food items. Compounds like proteins, fats, and carbohydrates are considered macronutrients.
Technically, the body is incapable of producing most nutrients. For instance, the body can not produce fat-soluble compounds like vitamin E, which works as an antioxidant. Therefore, an individual needs to consume vegetables and fruits rich in vitamin E to fulfil the requirement.
To understand the concept better, one needs to list down how many types of nutrition are available first. The types of nutrition are segregated into two categories, namely, autotrophic and heterotrophic.