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Table 1 Fatty acid composition of a capsule containing 1 g of pure fish oil

From: Omega-3 mechanism of action in inflammation and endoplasmic reticulum stress in mononuclear cells from overweight non-alcoholic fatty liver disease participants: study protocol for the “Brazilian Omega Study” (BROS)—a randomized controlled trial

Carbons/insaturations/ω-position

Nomenclature (IUPAC)

mg/g

C8:0

Octanoic acid, methyl ester

0.0411

C10:0

Decanoic acid, methyl ester

0.0564

C14:0

Methyl tetradecanoate

0.3816

C16:0

Hexadecanoic acid

1.4015

C16:1

Hexadecenoic acid

0.6626

C18:0

Methyl stearate

1.8020

C18:1 (ω9)

Octadecenoic acid

3.6400

C18:2 (ω6)

Octadecadienoic acid

0.3841

C18:3 (ω3)

Octadecatrienoic acid

0.1981

C19:0

Nonadecanoic acid

0.1619

C20:1

cis-11-Eicosenoic acid

3.5847

C20:1

cis-13-Eicosenoic acid

0.5901

C20:2 (ω3)

8,11-Eicosadienoic acid

0.4160

C20:2 (ω6)

11,14-Eicosadienoic acid

0.4051

C20:3

Eicosatrienoic acid

0.2284

C20:4 (ω6)

Eicosatetraenoic acid

1.6491

C21:0

Heneicosanoic acid

0.3023

C20:5 (ω3)

Eicosatetraenoic acid

19.0560

C22:0

Docosanoic acid

0.8260

C22:1

Docosenoic acid

6.3434

C22:4 (ω6)

Docosatetraenoic acid

0.3351

C22:6 (ω3)

Docosatetraenoic acid

55.0547

C24:0

Tetracosenoic acid

2.4781

 

∑SAT

7.45

 

∑MONO

14.8208

 

∑POLY

77.7266

 

ω6

2.7734

 

ω3

74.3087

  1. IUPAC International Union of Pure and Applied Chemistry, ω Omega, Σ sum, SAT saturated fatty acids, MONO monounsaturated fatty acids, POLY polyunsaturated fatty acids. *EPA, DHA plus other ω3 species