12 Nutritional Deficiencies and the Visual Signs They Produce

7. Protein-Energy Malnutrition - Kwashiorkor and Marasmus

Protein-energy malnutrition manifests in two primary forms, each with distinct visual characteristics that reflect different patterns of nutrient depletion. Kwashiorkor, primarily caused by protein deficiency in the presence of adequate calories, produces the characteristic "moon face" appearance with facial puffiness and edema that extends to the hands, feet, and abdomen, creating a deceptively well-nourished appearance despite severe malnutrition. The skin develops a distinctive "flaky paint" dermatosis, where large areas peel away in sheets, revealing raw, hyperpigmented patches underneath, particularly in areas exposed to friction or pressure. Hair undergoes dramatic changes, becoming thin, sparse, and easily pluckable, often changing color from dark to reddish or blonde in a flag-like pattern that reflects periods of adequate versus inadequate protein intake. In contrast, marasmus, caused by overall calorie deficiency, produces severe wasting with prominent ribs, sunken cheeks, and a wizened, elderly appearance in children. The skin becomes loose and wrinkled, hanging in folds due to loss of subcutaneous fat, while hair becomes thin and brittle. Both conditions may present with delayed wound healing, increased susceptibility to infections, and in children, significant growth retardation that becomes apparent when compared to healthy peers of the same age.