Serum or plasma mass concentration of a specific protein or peptide biomarker (likely related to kidney function or metabolic screening)

What This Test Measures

This test quantifies a specific protein or peptide in your blood, which may be linked to kidney function, protein metabolism, or other physiological processes. The exact substance depends on the clinical indication, but it could include markers like albumin, creatinine, or other biomarkers used in routine or specialized screening.

Why It’s Ordered

Your healthcare provider may order this test to evaluate kidney health, screen for metabolic disorders, monitor chronic conditions, or assess protein levels in the blood. It can also help diagnose or manage conditions such as kidney disease, liver dysfunction, or certain genetic disorders.

How the Test Works

Blood is drawn from a vein, typically in your arm. The sample is then processed to separate serum or plasma, where the specific substance is measured using advanced laboratory techniques, such as mass spectrometry or immunoassay, to determine its concentration.

Preparation and Sample Collection

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it involves a specific type of blood draw. On the day of the test, avoid smoking or consuming alcohol. Bring any medications you’re currently taking to discuss with your provider.