Serum/plasma concentration of free fatty acids (by high-performance liquid chromatography)

Why This Test Might Be Ordered

Your healthcare provider may order this test if you have symptoms such as fatigue, muscle weakness, or unexplained weight changes. It could also be part of routine monitoring for conditions affecting fat metabolism, such as diabetes, thyroid disorders, or liver disease. Additionally, it may be used in research or specialized clinical settings to assess lipid profiles in specific circumstances.

What to Expect Before the Test

No special preparation is typically required for this test. You may have a small needle inserted into a vein in your arm to draw blood. If you are fasting, follow your provider’s instructions regarding when to eat or drink before the test. Avoid smoking or consuming caffeine for a few hours before the draw if advised.

What Happens During the Test

Blood will be drawn from a vein in your arm by a healthcare professional. You may feel a slight pinch, but the procedure usually takes just a few minutes. The blood sample is then sent to a lab for analysis using high-performance liquid chromatography (HPLC), which separates and measures the different fatty acids in your blood.

What the Results Mean

Results provide a profile of your free fatty acid levels, which can help identify imbalances. Elevated levels might suggest conditions like diabetes, liver disease, or certain metabolic disorders, while lower levels could indicate malabsorption issues or other metabolic problems. Your provider will interpret these results in the context of your overall health and symptoms.