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| | MedlinePlus Medical Encyclopedia: Weight loss - unintentional |
 | | There are many causes of unintentional weight loss including endocrine, gastrointestinal, neurological, psychiatric, and eating disorders (see anorexia nervosa), as well as nutritional deficiencies, infections, and tumors. |
 | | Weight loss is excessive (greater than 10% of normal body weight) and unexplained. |
 | | For weight loss caused by a chronic illness, tube feeding may be administered in order to maintain nutrition and to prevent edema, poor healing, and muscle wasting. |
| www.nlm.nih.gov /medlineplus/ency/article/003107.htm (551 words) |
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