Children with severe malnutrition have an increased risk of serious illness and death.<unk>  is one of the main forms of childhood malnutrition living in low-income and middle-income countries.<unk>  is oftentimes referred to as severe acute malnutrition (SAM). Severe forms of malnutritions are recognized, including stunting, marasmus, and<unk> . Both<unk>  and marasmus fall under the umbrella of deficiencies called protein–energy malnutrition (PEM). These diseases are oftentimes discussed together, but can be distinguished.<unk>  is classified by its insufficient protein consumption whereas marasmus is related to general energy deficiency and severe muscle wasting.<unk>  is also distinguished from marasmus by the presence of edema. There is also marasmic<unk>  that is the deficiency in calories and in protein. Although they are both different types of severe acute malnutrition, there was greater consumption of antioxidants, vitamins, and minerals seen in those with<unk>  compared to those with marasmus. Wellcome's classification Wellcome classification is a system for classifying protein-energy malnutrition in children based on weight for their age and based on presence of edema. Other classifications include Gomez classification and Waterlow classification. Weight for age With edema Without edema General considerations 60-80%<unk>  Undernutrition * Weight for age +/- oedema * Reference standard (50th percentile) <60% Marasmic<unk>  Marasmus
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