We stand behind our service
Go directly to the lab, no extra fees
With friendly doctor's notes & guidance
Lab visit as quick as 10 mins in & out
We stand behind our service
Go directly to the lab, no extra fees
With friendly doctor's notes & guidance
Lab visit as quick as 10 mins in & out
This test is ideal if you're experiencing unexplained low blood sugar episodes, especially if they happen when fasting or after meals. It helps diagnose insulinomas (rare insulin-producing tumors) and assess how your body is producing and processing insulin. Many people use this test when they have symptoms like shakiness, sweating, confusion, or rapid heartbeat related to blood sugar drops that aren't explained by diabetes medication.
You'll need to fast overnight before having your blood drawn for this test. This means no food or drinks except water for at least 8-12 hours prior to your appointment. Fasting is essential because it provides the most accurate baseline measurement of proinsulin levels without interference from recent food intake.
This test measures proinsulin, which is the precursor molecule your pancreas makes before converting it into active insulin. Elevated proinsulin levels can indicate problems with insulin production, insulin resistance, or the presence of an insulinoma (a rare pancreatic tumor that causes too much insulin). This measurement helps doctors understand whether your low blood sugar episodes are caused by excessive insulin production or other metabolic issues.
Search Quest Diagnostics and LabCorp locations available through Private MD Labs.
Your 24/7 Personal Lab Guide