MedicalTerminology DB
Biological & Chemical Substances

polyunsaturated fatty acid

Meaning of polyunsaturated fatty acid: A fatty acid containing more than one double bond (C=C).

Definition of polyunsaturated fatty acid

A fatty acid containing more than one double bond (C=C). The essential fatty acids omega-3 and omega-6 are polyunsaturated fatty acids (PUFAs) that contain 2 or more cis double bonds. Dietary intake of some PUFAs may have beneficial effects on blood pressure, serum lipds, and inflammation. Some PUFAs, such as omega-3 PUFAs, may have antineoplastic or chemopreventive activities.

Written and maintained by James Murray Last updated July 21, 2026 Educational reference, not medical advice. Read the limitations.

For learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.