3-Methoxy-4-hydroxyphenylglycol (MHPG) is a metabolite of norepinephrine degradation. In the brain, it is the principal norepinephrine metabolite. It is released into the blood and cerebrospinal fluid, and a blood sample of it may therefore be an indication of recent sympathetic nervous system activity.
2 edits since May 19, 2008. Last edited Jul 05, 2008 by WriterHound (28).
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