Post Prandial Insulin

Function

The Post Prandial Insulin test measures the amount of insulin produced by the pancreas in response to a glucose load, typically two hours after a meal. Insulin is a vital hormone that facilitates the uptake of glucose into cells for energy production. Monitoring insulin levels post-meal provides a dynamic view of pancreatic beta-cell function and the body's sensitivity to insulin, which fasting levels alone may not reveal.

Why it is Ordered

Physicians order this test to investigate several metabolic conditions. It is primarily used to diagnose insulin resistance, where cells fail to respond effectively to insulin, leading the pancreas to overcompensate. It is also instrumental in evaluating 'reactive hypoglycemia'—a condition where insulin spikes too high after eating, causing blood sugar to crash. Additionally, it helps in the early detection of Type 2 Diabetes and the evaluation of Polycystic Ovary Syndrome (PCOS), where hyperinsulinemia is a common underlying factor.

Associated Conditions

• Insulin Resistance: Characterized by elevated post-meal insulin despite normal or slightly high glucose.
• Metabolic Syndrome: A cluster of conditions including high blood pressure and excess body fat.
• Insulinoma: A rare pancreatic tumor that secretes excessive insulin.
• Type 2 Diabetes: Early stages often show high post-prandial insulin, while late stages show declining levels due to pancreatic exhaustion.
• PCOS: Often associated with exaggerated insulin responses to carbohydrates.