Test guide

Porphyrin Tests

Porphyrin tests measure the level of porphyrins in your blood, urine (pee), or stool (poop). Your body uses porphyrins to make heme. Heme is part of hemoglobin, which is a protein in your red blood cells that carries oxygen from your lungs to the rest of your body.

For everyone & professionalsReviewed 2026-10-18

What it is for

Porphyrin tests are used to help diagnose or to monitor all types of porphyria. Source: MedlinePlus, National Library of Medicine. Medical test information is public domain. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.

Limitations

Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.

Also known as

  • protoporphyrin
  • protoporphyrin, blood
  • protoporhyrin, stool
  • porphyrins, feces
  • uroporphyrin
  • porphyrins, urine
  • Mauzerall-Granick test
  • acid

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