Other Omega 3 Fatty Acids

In addition to the 3 major omega 3 fatty acids - alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) - there are an number of other n-3 fatty acids found in nature. These include the following:

Stearidonic acid (STD)

  • Alternative common name: Moroctic acid
  • Chemical name: all-cis-6,9,12,15-octadecatetraenoic acid
  • Chemical formula: C18H28O2
  • Lipid name: 18:4 (n-3)
  • Natural sources: cyanobacterium spirulina, hemp seed oil, blackcurrant seed oil

Eicosatrienoic Acid (ETA)

  • Chemical name: all-cis-11,14,17-eicosatrienoic acid
  • Chemical formula: C20H34O2
  • Lipid name: 20:3 (n-3)
  • Natural sources: shark-liver and herring oil

Eicosatetraenoic Acid

  • Chemical name: all-cis-8,11,14,17-eicosatetraenoic acid
  • Chemical formula: C20H32O2
  • Lipid name: 20:4 (n-3)
  • Natural sources: green-lipped mussels

Docosapentaenoic acid (DPA)

  • Alternative common name: Clupanodonic acid
  • Chemical name: all-cis-7,10,13,16,19-docosapentaenoic acid
  • Chemical formula: C22H34O2
  • Lipid name: 22:5 (n-3)
  • Natural sources: herring oil, seal oil, liver lipids of cattle

Tetracosahexaenoic Acid

  • Alternative common name: Nisinic acid
  • Chemical name: all-cis-6,9,12,15,18,21-tetracosahexaenoic acid
  • Chemical formula: C24H36O2
  • Lipid name: 24:6 (n-3)