A compound formed from the breakdown of hemoglobin, containing a five-membered nitrogen ring structure related to porphyrins.
From Greek 'haima' (blood) + 'pyrrole' (a five-membered aromatic ring containing nitrogen). The term describes a specific class of hemoglobin metabolites.
When your red blood cells die after 120 days, hemopyrroles are created as your body breaks down hemoglobin—these molecules become part of bile and give your poop its brown color!
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