R U H Bath, return to home page

Pathology Departments Requesting & Reporting Blood Test Information Phlebotomy Guide Contact us
Blood Sciences

Blood Test Information

Free Fatty Acids
(a.k.a FFA, NEFA, non-esterified fatty acids)
minimum sample volume required ~ 2.5ml

  back to assay index

Test Code: FFA

Special instructions
Send to laboratory immediately following collection.

A concurrent sample for laboratory glucose must also be sent.

Sent away to Southmead Hospital

Reference range
0.10 - 0.90 mmol/L (fasting)


Turnaround Time
10 days

Department: Biochemistry

Clinical Application
Free fatty acids (FFAs), which include beta-hydroxybutyrate (BHB), are produced when glucose cannot be used as a fuel source. FFAs can be measured in the investigation of hypoglycaemia, or in those with symptoms associated with ketoacidosis.

The ratio of FFA/BHB may be used to detect fatty acid oxidation defects, or hyperinsulinism.

Please note: This is not the same as very long chain fatty acids (VLCFA) or essential fatty acids.

Webpage updated: March 2024


back to top