The level of gastrin in the blood varies
throughout the day, but it is usually lowest in the
Gastrin test results are most useful when they are
evaluated along with medical information gathered from other examinations or
If you have normal or mildly elevated gastrin levels but
continue to have problems with peptic ulcers, further blood testing may be
done. An intravenous secretin test helps determine whether peptic ulcers are
being caused by Zollinger-Ellison syndrome. Gastrin levels generally increase
by more than 200 picograms per milliliter (pg/mL) in people who have
Zollinger-Ellison syndrome, but they rise only slightly or decrease in people
who do not have the syndrome.
Other Works Consulted
Chernecky CC, Berger BJ (2008). Laboratory Tests and Diagnostic Procedures, 5th ed. St. Louis:
Fischbach FT, Dunning MB III, eds. (2009).
Manual of Laboratory and Diagnostic Tests, 8th ed.
Philadelphia: Lippincott Williams and Wilkins.
Pagana KD, Pagana TJ (2010). Mosby?s Manual of Diagnostic and Laboratory Tests, 4th ed. St. Louis: Mosby Elsevier.
Primary Medical Reviewer
Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer
Jerome B. Simon, MD, FRCPC, FACP - Gastroenterology