Understanding Protein Imbalance: Causes, Risks & Solutions

Protein deficiency (hypoproteinemia) is rare in healthy adults in developed nations with varied diets. It arises in specific contexts:

Causes

• Inadequate intake: Famine, severe food insecurity, extreme restrictive diets (e.g., fruitarian, very low-calorie).
• Malabsorption: Celiac disease, Crohn's, short bowel syndrome, pancreatic insufficiency.
• Increased losses: Nephrotic syndrome (urine), protein-losing enteropathy (gut), severe burns, wound exudate.
• Increased demand: Critical illness, trauma, sepsis, major surgery.
• Liver failure: Impaired synthesis (albumin, clotting factors).

Consequences

• Edema (low oncotic pressure)
• Muscle wasting, weakness
• Impaired immunity, wound healing
• Hair loss, skin changes
• Growth failure in children (kwashiorkor, marasmus)

Management

Treat underlying cause. Nutritional support: oral high-protein diet, enteral/parenteral nutrition if needed. Monitor albumin, prealbumin, nitrogen balance. In critical illness, protein targets are higher (1.2–2.0 g/kg/day).