Vitamin D Binding Protein (DBP) or Serum Protein Electrophoresis (General Protein Profile)

What This Test Measures

The test can include two main components: measuring vitamin D-binding protein levels or performing a protein electrophoresis to separate and analyze different proteins in your serum. Vitamin D-binding protein is a carrier protein that transports vitamin D in the blood. Protein electrophoresis helps identify patterns of protein distribution, which can reveal conditions like multiple myeloma, liver disease, or other protein abnormalities.

Why It’s Ordered

Your healthcare provider may order this test if you have symptoms or risk factors for conditions affecting protein levels or vitamin D metabolism, such as kidney disease, liver disease, or malnutrition. It may also be used as part of a broader evaluation for unexplained protein abnormalities in the blood.

Common Reasons for Testing

Common reasons include evaluating symptoms like fatigue, muscle weakness, or unexplained weight loss, monitoring chronic conditions like kidney or liver disease, or checking for signs of protein disorders. It may also be used in research or specialized diagnostic scenarios.

Sample Collection and Preparation

A blood sample is typically drawn from a vein in your arm. The blood is placed in a special tube that separates serum (the liquid part) from blood cells. This serum is then processed and analyzed in a lab.