Digestion And Absorption

Marasmus is a form of severe protein-energy malnutrition characterised by energy deficiency. It is caused by a severe deficiency of nearly all nutrients, especially protein and calories. The malnutrition associated with marasmus leads to extensive tissue and muscle wasting, as well as variable edema. Other common characteristics include dry skin, loose skin folds hanging over the glutei, axillae, etc. There is also drastic loss of adipose tissue from normal areas of fat deposits like buttocks and thighs. The afflicted are often fretful, irritable, and voraciously hungry.

Pellagra is a vitamin deficiency disease most commonly caused by a chronic lack of niacin (vitamin- ) in the diet. It may also result from alternations in protein metabolism in disorders such as carcinoid syndrome. A deficiency of the amino acid lysin can lead to a deficiency of niacin as well.