What is this test?
The test measures antibodies against insulin. They can be autoantibodies in type 1 diabetes or occur after insulin treatment.
Why might it be ordered?
- As part of an autoimmune diabetes panel, especially before starting insulin treatment.
- In specialized evaluation for unexplained fluctuations in blood sugar or suspected influence of antibodies.
What sample is needed?
A healthcare professional collects a venous blood sample. Depending on the method, the laboratory uses serum or plasma.
How should you prepare?
Tell the laboratory about all medicines, hormone treatments, vitamins and supplements you take. Do not stop or change treatment unless your clinician tells you to. Follow any instructions about fasting and the time of collection.
How should you understand the result?
A positive result is interpreted according to whether and when insulin is administered and together with other diabetic autoantibodies and C-peptide. A positive result means the tested antibodies were detected, but it does not establish a diagnosis on its own. A negative result does not rule out every autoimmune condition.
Sources and editorial status
This patient-facing text is an editorial draft. It should be approved by a laboratory physician before official publication.