Immunoassay for Retinoic Acid (Serum/Plasma)

Why Is This Test Done?

Your healthcare provider may order this test if you’re taking isotretinoin (a medication used to treat severe acne or other skin conditions) to ensure it’s working properly or to check for potential side effects related to vitamin A metabolism. It may also be used in research or specialized clinical settings to evaluate metabolic pathways.

What Does the Test Measure?

Retinoic acid is a biologically active form of vitamin A that plays a role in skin health, immune function, and cell growth. Elevated or low levels may indicate how well your body is processing isotretinoin or suggest underlying metabolic issues.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where it is analyzed using an immunoassay method to detect retinoic acid levels. No special preparation is needed, but fasting may be advised depending on clinical context.

What Are Possible Results?

Results are reported as a concentration of retinoic acid in the blood (typically in ng/mL or similar units). Interpretation depends on clinical context, such as your treatment regimen or symptoms. Your provider will discuss findings with you.