Understanding the 5-Hydroxyindoleacetic Acid (5-HIAA) Plasma Blood Test

If you’ve been advised to take a 5-Hydroxyindoleacetic Acid (5-HIAA) plasma blood test, it’s natural to wonder about its purpose.

While the name sounds complex, this test is a vital tool used primarily for diagnosing specific health conditions, notably neuroendocrine tumors (NETs).

This guide will cover what the test measures, how it’s performed, necessary preparation, and how to understand the results.

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