What Is cis-Eicosapentaenoic Acid (20:5 c)? What Foods Can I Find It In?

Cis-Eicosapentaenoic acid, or 20:5 c, is a remarkable straight-chain polyunsaturated cis fatty acid with all its double bonds in the cis configuration.

This unique compound is the cis-isomer of Eicosapentaenoic acid, also known as EPA (20:5). EPA is a well-known Omega-3 fatty acid, celebrated for its health benefits.

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The cis-Isomer of Eicosapentaenoic Acid

20:5 c is the cis-isomer of Eicosapentaenoic acid (EPA, 20:5), and it's a polyunsaturated fatty acid (source ). Isomers, in the world of chemistry, are compounds with identical chemical formulas but distinct structures.

In this context, 'cis-isomer' signifies that the functional groups are on the same side of the carbon chain, while the 'trans-isomer' indicates that they're on opposing sides of the carbon chain (source ).

cis-Eicosapentaenoic Acid: An Omega-3 Wonder

Like its cousin Eicosapentaenoic Acid (EPA), cis-Eicosapentaenoic acid belongs to the illustrious Omega-3 family of fatty acids.

Omega-3 polyunsaturated fatty acids, often referred to as PUFAs, play a crucial role in human nutrition, primarily through fish oils.

You'll find these incredible fatty acids mainly in oily fish species like salmon, mackerel, herring, sardines, trout, and more.

Why are they important? Well, Omega-3 fatty acids are known to reduce the risk of cardiovascular diseases and certain types of cancer, making them a true health ally. Plus, they exert a positive influence on the central nervous system.

Where to Find cis-Eicosapentaenoic Acid

Wondering where you can get your dose of cis-Eicosapentaenoic acid?

Look no further than seafood, dairy and eggs, sausages, luncheon meats, and poultry products. Here are some examples of food sources:

Explore More with Our Nutrition Tool

Looking for a detailed list of foods rich in cis-Eicosapentaenoic acid? Our nutrition tool provides regularly updated, top-ranked lists of foods for over 200+ nutrients.

If you're curious about the best food sources of cis-Eicosapentaenoic acid, our tool is your go-to resource. Discover a variety of foods packed with cis-Eicosapentaenoic acid for a healthy, well-rounded diet.

Sara Niemelä

co-founder Care Omnia, Head Content Creator

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Nutrition is my passion. I've spent thousands upon thousands of hours reading, analyzing, categorizing and comparing research studies.

I’m a wife and a mother of three. I enjoy the outdoors, cooking, and spending time with my family.