Cachexia
Cachexia and malnutrition
Cachexia and malnutrition are related but not the same. Malnutrition happens when the body doesn't get enough nutrients, leading to changes in body weight, physical strength, and mental function. Malnutrition includes both disease-related malnutrition as well as malnutrition without disease such as seen in starvation or aging. Cachexia should be viewed as a type of malnutrition in which inflammation from a long-term illness causes unwanted muscle loss.
Cachexia and sarcopenia
Cachexia and sarcopenia are similar because both cause weight and muscle loss, along with symptoms like weakness and loss of appetite. The difference is sarcopenia is caused by aging, while cachexia happens due to long-term disease and inflammation.
Metabolic
The way the body uses nutrients is also changed in cachexia. People with cachexia can have loss of appetite, are less responsive to insulin, and can have increased fat breakdown, all of which make it difficult for the body to properly use food. This is especially true in people with cancer.
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