Fatty Acid
OA (Oleic Acid)
Also known as: Oleic acid, OA, Omega-9, C18:1
A monounsaturated omega-9 fatty acid abundant in olive oil. Primary fat of the Mediterranean diet, supporting cardiovascular health and reducing inflammation.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every OA (Oleic Acid) product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Garden of Life Vitamin Code RAW D3 | 85 A- | $0.39 |
| 2 | Nordic Naturals Complete Omega Xtra - Lemon | 81 A- | $0.98 |
| 3 | Nordic Naturals Complete Omega - Lemon | 75 B+ | $0.52 |
| 4 | Nature Made Triple Omega 3-6-9 Softgels | 72 B | $0.25 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much OA (Oleic Acid) should I take?
The typical range is 15-25 g daily from diet. Ongoing dietary component
When should I take OA (Oleic Acid)?
With meals. As part of meals.
Which form of OA (Oleic Acid) is best?
Olive oil — Primary dietary source. Other forms in the catalog: Avocado oil, High-oleic oils.
Is OA (Oleic Acid) safe?
Commonly reported: None at dietary levels. Serious warnings: None. Safe
Which OA (Oleic Acid) supplement scores highest?
Garden of Life Vitamin Code RAW D3, at 85/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
Primary uses
- Cardiovascular health
- Cholesterol support
- Anti-inflammatory
- Brain health
How it works
- Replaces saturated fat in cell membranes
- Reduces LDL cholesterol oxidation
- Improves HDL:LDL ratio
- Modulates inflammatory gene expression
- Supports brain myelin
Dosage
- Typical range
- 15-25 g daily from diet
- Timing
- With meals
- With food
- As part of meals
- Duration
- Ongoing dietary component
- Special populations
- Beneficial for cardiovascular risk
Forms
- Olive oil
- Avocado oil
- High-oleic oils
Safety
Common side effects
- None at dietary levels
Contraindications
- None
Products containing OA (Oleic Acid)
Top-scoring supplements in our catalog that list OA (Oleic Acid) on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
Evidence notes
Strong observational evidence from Mediterranean diet research
Grade B: Some human trials support key claims; further confirmation needed.
Related in Fatty Acid
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.