Medicine Which of the following is the Gold standard diagnostic test for Insulinoma? A '72 hour' fast test B Plasma Glucose levels < 3 mmol/L C Plasma Insulin levels > 6 uU/ml D C- peptide levels < 50 p mol/L 💡 Explanation Which of the following is the Gold standard diagnostic test for Insulinoma? ✓ Correct Answer: A. '72 hour' fast test