Histidine concentration in serum/plasma (mass concentration)

What Is Histidine Used For?

Histidine is a building block for proteins and plays a role in producing histamine, which helps regulate immune responses and digestion. It also supports the production of certain hormones and neurotransmitters like serotonin. While histidine itself isn’t directly linked to major health conditions, its metabolism can be influenced by genetic disorders or metabolic syndromes.

How Is This Test Performed?

A blood sample is drawn from a vein, typically in your arm. The sample is then processed to measure histidine levels using a specialized laboratory technique, often high-performance liquid chromatography (HPLC). This method separates and identifies histidine from other substances in the blood.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms or conditions related to amino acid metabolism, such as genetic disorders like histidinemia or maple syrup urine disease. It may also be used in research or specialized clinical settings to monitor protein metabolism or evaluate certain metabolic pathways.

What Does a Low or High Histidine Level Mean?

Interpretation of histidine levels depends on clinical context and may not have universally established reference ranges. Abnormal levels could suggest underlying metabolic issues, genetic disorders, or conditions affecting protein synthesis. Always discuss results with your doctor.