Types:
Kwashiorkor (Protein deficiency + adequate calories):
-Edema, "moon face," skin lesions, hypoalbuminemia (<2 g/dL).
-Labs: ↓ Albumin, ↓ Hb, normal electrolytes.
Marasmus (Caloric + protein deficiency):
-Severe wasting (weight <60% expected), no edema, "old man" appearance.
-Labs: Normal albumin, ↓ glucose, ↓ urea.