Eicosadienoic Acid

Fatty-acidBest with a meal

What is it

Eicosadienoic acid is a 20-carbon polyunsaturated fatty acid with two double bonds. The most common form (11,14-eicosadienoic acid) is an omega-6 fatty acid produced in the body from linoleic acid through elongation, and is also found in trace amounts in various animal fats and oils.

Evidence for 1 use

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Component of normal fatty acid metabolism

Mixed Evidence

EDA is an intermediate in the omega-6 elongation pathway. No isolated health benefit from EDA supplementation has been demonstrated; it is a marker of normal metabolism rather than a targeted intervention.

How it works

Eicosadienoic acid (EDA, 20:2 n-6) sits in the omega-6 elongation pathway between linoleic acid (LA, 18:2) and dihomo-gamma-linolenic acid (DGLA, 20:3). It is formed by the elongase enzyme ELOVL5 acting on linoleic acid, then further desaturated to form DGLA and arachidonic acid. EDA is a minor but consistent component of human plasma and tissue lipids. Functionally, EDA is incorporated into cell membrane phospholipids and contributes to membrane fluidity. Unlike its downstream metabolites, EDA itself is not a major precursor of eicosanoids in humans. It is often used as a research marker of fatty acid metabolism rather than as a targeted intervention. No clear deficiency or therapeutic supplementation case has been established for EDA specifically; it is present as a byproduct of normal omega-6 fat metabolism.

Dosage

There is no RDA for eicosadienoic acid as a standalone fatty acid. It is not typically sold as a supplement. Dietary intake comes from animal fats, with typical Western diets providing small amounts (under 100 mg/day). The body produces additional EDA from linoleic acid.

When and how to take it

Not applicable for stand-alone supplementation. As a component of dietary fats, take with meals that include fat for normal absorption.

1 commercial form

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EDA as part of dietary fats

Found in trace amounts in various animal fats and oils.

Absorbed with other long-chain fatty acids when consumed in food.

Safety

Generally considered safe at dietary levels. As a minor fatty acid found in normal foods, no specific safety concerns or toxicity data exist for EDA at typical exposures. No formal Tolerable Upper Intake Level has been established.

Who should be cautious

No specific cautions. People with allergies to specific fat sources (e.g., fish, soy) should choose oils accordingly.

Interactions

No significant interactions reported. As a component of normal dietary fat, EDA does not interact with medications.

Food sources

Animal fats (beef, lamb)

Amount
varies
%DV
—

Egg yolk

Amount
1 egg
%DV
—

Fish oils

Amount
1 teaspoon
%DV
—

Frequently asked questions

Should I supplement with eicosadienoic acid?⌄

There is no clinical evidence supporting EDA supplementation. It is produced by the body from linoleic acid and is present in normal dietary fats.

What is eicosadienoic acid used for?⌄

Primarily as a research and analytical reference, or as a marker of fatty acid status in lipid profiling. It has no established therapeutic role.

Is EDA the same as EPA?⌄

No. EPA (eicosapentaenoic acid) is a 20-carbon omega-3 with five double bonds, known for cardiovascular and anti-inflammatory roles. EDA has only two double bonds and is part of the omega-6 pathway.

References

Eicosadienoic Acid on Wikidata — Wikidata link

Eicosadienoic Acid on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Eicosadienoic Acid (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.