Understanding medical terms

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Hormones are the body’s chemical messages that travel in the blood to other tissues or organs. They can affect many different processes such as growth, mood, sexual function, or how the body gets energy from the food that is eaten.

5-hydroxyindoleacetic acid (5-HIAA)

The hormone serotonin is broken down in the liver to 5-HIAA, and the levels of this can be raised in the blood or urine of patients with a diagnosis of NET.