9 days
Enzyme immunoassay (EIA)
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Precursor to insulin. Elevated in insulinoma or beta-cell dysfunction.
Serum Frozen
0.6 mL
Red-top tube or gel-barrier tube
No special preparation is required for this test. You may eat, drink, and take your medications as normal, unless instructed otherwise by your healthcare provider.
This test does not require any special collection or pre-analytical handling. Follow routine specimen collection protocols.
| Temperature | Period |
|---|---|
| Frozen | 12 days |