Serum or Plasma Substance Concentration (Bromocresol Green) for a Specific Protein or Metabolite (e.g., Bilirubin, Creatinine, or Triglycerides)

What This Test Measures

Bromocresol green is a dye that binds to substances in your blood, such as proteins, fats, or bilirubin. The test measures how much dye is needed to change color, which correlates with the concentration of the target substance. This method is often used for measuring substances like bilirubin, creatinine, or triglycerides.

Why It Matters in Your Health

Your body relies on specific substances to function properly. For example, bilirubin helps remove waste from your blood, while creatinine reflects kidney function. Abnormal levels may signal problems like liver disease, kidney issues, or metabolic disorders.

Common Uses for This Test

Doctors may order this test to diagnose or monitor conditions such as liver disease, kidney problems, or high cholesterol. It can also help track how well treatments are working or check for metabolic imbalances.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if measuring substances like triglycerides. Bring any medications or supplements you’re taking to your appointment.