Proper nutrition helps keep energy level up & protects against many age-related illnesses & diseases like heart diseases, cancer and diabetes. Nutrition is a critical part of health and development better nutrition is related to improved infant, child & maternal health, stronger immune system, safer pregnancy and childbirth, lower risk of non-communicable diseases (such as diabetes & cardiovascular diseases) and longivity.
At the most basic level, nutrition is about eating a regular, balanced diet good nutrition helps fuel your body. The food you eat supply the nutrients your body needs to maintain your brain, muscle, bone, nerves, skin, blood circulation, and immune system.
Two major classes of nutrients in food :- Macronutrients & micronutrients.
Macronutrients are carbohydrated, protein & fat they supply energy (in the form of calories) and serve as the building blocks for muscles and tissues. In comparision, micronutrients are individual vitamins & minerals. They are divided into four categories :- Water soluble, fat soluble, microminerals & traceminerals.

The Each type of macronutrient performs an important role in keeping the body healthy. For optimum health, people typically require a balance of macronutrients.
Carbohydrates
Carbohydrates are preferred source of energy for several body tissues, and the primary energy source for the brain. The body can break carbohydrates down into glucose, which moves from the bloodstream into the body’s cells and allows them to function. Carbohydrates are important for muscle contraction during intense exercise. Even at rest, carbohydrates enable the body to perform vital functions such as maintaining body temperature, keeping the heart beating, and digesting food.
Protein
Proteins consists of long chains of compounds called amino acids. These play an essential role in the growth, development, repair, and maintenance of body tissues. Protein is present in every body cell, and adequate protein intake is important for keeping the muscles, bones, and tissues healthy. Protein also plays a vital roles in bodily processes, such as aiding the immune system, biochemical reactions, and providing structure and support for cells.
Fats
Fats are an important part of the diet that can also provide the body with energy. While some types of dietary fats may be healthier than others, they are an essential part of the diet and play a role Trusted Source in hormone production, cell growth, energy storage, and the absorption of important vitamins.
One who does not do any work except to get some benefit from it. Do not be angry with pain in scolding. In happiness he wants to become hairy with pain in the hope that reproduction will not occur. Unless they are blinded by lust, they do not move forward; The culprits are those who abandon their duties and soften their hearts, that is, their hard work.
Another important part of nutrition is the Micronutients, which includes Vitamins and minerals.

Malnutrition in every form, presents significant threats to human health. Today the worls faces a double burden of malnutrition that includes both undernutrition and overweight, especially in low and middle income countries. There are multiple forms of malnutrition, including undernutrition (wasting or stunting), inadequate vitamins or minerals, overweight, obesity & resulting diet realted non communicable diseases.