The body breaks down protein into energy that can be used. They then do not have enough protein for other functions in their bodies. Children from aged 1-5 years usually get this but rarely adults and older children get it. It is common in poor places in Africa. Symptoms include having a pot belly, swollen face, and hair that is dark then light then dark. This can be cured by having a protein rich diet.
In a more simpler way, it can be defined as protein deficiency in diet. Body parts becomes swollen due to accumulation of water in the intercellular spaces. Very poor muscle developement, swollen legs, fluffy face difficult to eat, diarrohea, dry skin are the symptoms of this disease.