Causes of Copper Deficiency - Differential Diagnosis
Hereditary: 
 - Menkes disease, familial hypoceruloplasminemia
Decreased / Inadequate Intake: 
 - Anorexic patients, malnutrition, Kwashiorkor, poverty, vegetarian, parenteral hyperalimentation
Increased Demand: 
 - Pregnant women, lactating women, premature infants, infants
Increased copper loss or inadequate absorption: 
 - Malabsorption conditions include inflammatory bowel disease, ulcerative colitis, Crohn's disease, Celiac sprue, post-bariatric surgery, gastrectomy, prolonged diarrhea, protein-losing enteropathy, sprue, tropical and non-tropical
Drug-related: 
 - Excessive zinc ingestion (e.g., from dentures, or excessive oral supplementation) or iron supplements
Iatrogenic: 
 - Parenteral or enteral nutrition with inadequate copper supplements

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