• Carbohydrates (body’s energy,power and heat source):

Sugar, fiber and starches are nutrients occurs in plants and dietary products, which body turns into glucose which helps in the proper functioning of body.

•  Minerals

Essential for proper functioning of human body.
Macrominerals are major minerals and Trace minerals are Microminerals as per the needs of human body. 
Eg: Sodium, potassium, calcium

• Vitamins

A vitamin is an organic compound, which means that it contains carbon. It is also an essential nutrient that the body may need to get from food. 
Eg: Vitamin A, Vitamin D and so on

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• Proteins the building blocks of the body:

Proteins are large, complex molecules that play many critical roles in the body. They do most of the work in cells and are required for the structure, function, and regulation of the body’s tissues and organs.
Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chains.

• Water

It is the most essential nutrient. A human can lasts days without food but cannot survive without water for few days. 
All the biochemical reactions in the body takes place in the water. The spaces between cells and tissues is filled with water.

• Elements:

Almost 99% of the human body mass consists of six main elements; namely: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphor; 65–90% of each cell in the body is composed of water, as such, oxygen and hydrogen are among the main constituents of the human body.