Omega-3 Index

Nutrients connected to Omega-3 Index

A link means the body needs the nutrient for this, or that low intake is linked to it. It does not mean extra supplements help if your intake is already adequate; each link shows how strong the evidence is.

• Algal (algae) oilPreliminary or mixed

  Algal DHA raised DHA in plasma and red blood cells in small trials; this shows blood levels, not health benefit.

• NannochloropsisPreliminary or mixed

  In one trial the omega-3 index rose from 4.96 to 5.75 on an EPA-rich extract. A blood marker, tested on a company product.

• Flaxseed oil and plant omega-3 (ALA)Preliminary or mixed

  Supplemental ALA raises blood EPA and DPA but has little effect on DHA, so it is a weak way to raise the Omega-3 Index; a blood level is a marker, not a health outcome.

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