Nutrition

Nutrition is defined as the supply of materials - food - required by organisms and cells to stay alive. The science of nutrition also covers the fact of why certain diseases could be derived from poor or mal nutrition.
Another part of nutrition is that is also focuses on how diseases, conditions and problems can be prevented or lessened with a healthy diet. Nutrition basically covers the study of nutrients in food, how the body uses nutrients, and the relationship between diet, health and disease.

What is malnutrition?

It is also known as under nutrition which happens in case a person is not taking the sufficient intake of proteins and calories to maintain a healthy growth. Malnutrition can also refer to excessive or imbalanced consumption of nutrients which also in turn has an effect on the human health.
“The World Health Organization (WHO) says that malnutrition is by far the largest contributor to child mortality globally, currently present in half of all cases. Underweight births and inter-uterine growth restrictions are responsible for about 2.2 million child deaths annually in the world. Deficiencies in vitamin A or zinc cause 1 million deaths each year. “
(http://www.medicalnewstoday.com/articles)