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Common causes of copper deficiency.
| Malabsorption of copper |
| Gastric surgery, including gastric bypass or gastrectomy |
| Enteropathies such as inflammatory bowel disease, cystic fibrosis, and celiac disease |
| Excessive use of copper chelators |
| Zinc supplement overuse, parenteral overdosing, denture cream ingestion |
| Chronic total parenteral nutrition, prolonged jejunal enteral feeding |
| Diet low in copper |
| Cause unknown |
