Roll Call

“Omega-9?”Here!oleic acid / monounsaturated fat

Plant

Hasn’t appeared in a scanned product yet.

As a supplement

Talk to your doctor or pharmacist.

Roll Call does not check drug interactions or assess personal safety.

A category name for monounsaturated fatty acids, most commonly oleic acid, found in olive oil, canola oil, and other plant oils. Unlike omega-3 and omega-6 fats, the body can synthesize omega-9 fats on its own, so they are not considered essential nutrients.

Why it’s used

Taken as a dietary fat source, often associated with diets like the Mediterranean pattern that are studied for cardiovascular health.

What the evidence says

Because omega-9 fats are not essential, there is no deficiency or established supplement dose to correct. Population studies link diets high in monounsaturated fat to favorable cardiovascular markers, but this reflects overall dietary pattern rather than evidence for an isolated omega-9 supplement ingredient.

Where we looked

There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.

  • PubMed: 85 records · searched September 2026"Omega-9"[Title/Abstract] AND (review[pt] OR "safety assessment"[Title/Abstract] OR "risk assessment"[Title/Abstract] OR toxicology[Title/Abstract] OR toxicity[Title/Abstract] OR characterization[Title/Abstract] OR characterisation[Title/Abstract])
  • PubMed: 6 records · searched September 2026"Omega-9"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH]
  • PubMed: 523 records · searched September 2026"Omega-9"[Title/Abstract]

This says what this database holds under these terms. It is not a finding that no research exists.

Context

Most of the supporting research concerns whole dietary patterns (such as olive-oil-rich diets) rather than isolated omega-9 supplementation, making it hard to translate into a specific studied dose.

Insufficient dataToo little has been studied to say either way.

Rumors

  1. Omega-9 fatty acids reduce the risk of cardiovascular disease and stroke.

    Unresolvedhealth and safety evidence

    Measured as an outcome.

    Who’s saying this

    • draxe.com — we couldn’t open the site to see who runs it

  2. Omega-9 lowers cholesterol levels and promotes healthy inflammation responses.

    Unresolvedhealth and safety evidence

    Measured as a biomarker.

    Who’s saying this

  3. Omega-9 supplements are unnecessary because the body makes omega-9 itself; the omega-9 in 3-6-9 blends is marketing hype.

    We haven’t found evidence strong enough to support this or rule it out.

    What was measured is not yet noted.

    Who’s saying this

    • drweil.com — we couldn’t open the site to see who runs it

  4. Omega-9 (oleic acid) increases energy, decreases anger and enhances mood.

    We haven’t found evidence strong enough to support this or rule it out.

    What was measured is not yet noted.

    Who’s saying this

    • draxe.com — we couldn’t open the site to see who runs it

  5. Consuming too much omega-9 raises the risk of obesity and cardiovascular disease.

    Does not support — suggestivehealth and safety evidence

    Measured as a biomarker.

    Who’s saying this

    • NYO3 — a brand: sells dietary supplements (krill oil, omega-3)
      How we know who this is
      • “NYO3 is a dietary supplement brand from Norway.” (their page)
      • “NYO3® offers a variety of high-quality supplements which include Omega-3 supplements and high-quality omega-3 fatty acid supplements.” (their page)