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Malnutrition is a condition marked by lack or excess of nutrients in the diet. The first condition is called undernourishment (lack of sufficient protein, calories or micronutrients) whereas the second is called overnutrition (too much of protein, calories or fat). Undernutrition is further categorized into protein-energy malnutrition and micronutrient deficiency disorders. Protein energy malnutrition is caused by deficiency of any or all of the nutrients in the body. It results from severe shortage of food or chronic deprivation. On the other hand, micronutrient deficiency disorders are caused by deficiency of specific micronutrients like vitamins, iron, iodine, etc. It is also referred to as hidden hunger; i.e. a condition marked by the lack of vitamins and minerals in diet that impacts growth and development. The causes of malnutrition include various medical and environmental factors including digestive disorders, alcoholism, mental health conditions, low food intake, poor eating habits (not cooking at home or eating meals outside), etc. Regular vomiting and diarrhea can also cause loss of vital nutrients in the system and, in turn, lead to malnutrition.