C-PEPTIDE, SERUM

What this test checks

C-peptide is released alongside insulin — measuring it shows how much insulin your own body produces.

Why do people get this test?

Used to distinguish type 1 from type 2 diabetes and evaluate unusual blood sugar problems.

When you should consider this test

• Determining diabetes type
• Investigating low blood sugar attacks
• Specialist diabetes work-up

How to prepare

Fasting preferred unless your doctor advises otherwise.