Oleic Acid

Primary monounsaturated omega-9 fatty acid supporting cardiovascular health, inflammation reduction, and cellular membrane function

Scientific namecis-9-Octadecenoic acid FormulaC18H34O2 Molecular weight282.46 g/mol CAS112-80-1

95 absorption score

9 safety / 10

20 USD per month

5 documented interactions

Check it against something

Evidence level A

Oleic Acid with:

82 out of 100

Works better together Compatible. Timing differs, so follow each supplement's own window.

Check it against your whole stack →

What it does

mechanism and evidence for each claim

Cardiovascular health and protection

Supports heart health and reduces cardiovascular disease risk

Improves lipid profiles, reduces LDL oxidation, and supports arterial health Evidence A-grade 4-12 weeks

Anti-inflammatory effects

Reduces systemic inflammation and inflammatory markers

Modulates inflammatory pathways and reduces pro-inflammatory cytokines Evidence B-grade 2-8 weeks

Cholesterol and lipid optimization

Improves cholesterol ratios and overall lipid profile

Increases HDL cholesterol while reducing LDL and triglycerides Evidence A-grade 6-12 weeks

Insulin sensitivity and blood sugar support

Enhances insulin sensitivity and supports healthy blood glucose levels

Improves cellular insulin response and glucose metabolism Evidence B-grade 4-12 weeks

Cellular membrane health and function

Supports optimal cellular membrane composition and function

Integrates into cell membranes improving fluidity and signaling Evidence B-grade 4-16 weeks

Others take these for the same thing

Same goal, different mechanism — check any of them against this one

Coenzyme Q10 (CoQ10) Heart health & cellular energy 100-200mg A 10% Fish Oil (EPA/DHA) Heart & brain health 1-2g EPA/DHA A 85% Psyllium Husk Digestive health & cholesterol support 5-15g A 95% Calcium Citrate Superior absorption bone & heart health 500-1200 mg A 45% Taurine Cardiovascular & exercise support 1-3g A 95% L-Citrulline Athletic performance & circulation 3-8g A 95%

Every pair we checked

12 combinations scored by the engine

Oleic Acid + Caffeine No documented interaction either way No known interaction 70

Oleic Acid + Creatine Monohydrate No documented interaction either way No known interaction 70

Oleic Acid + Calcium Carbonate No documented interaction either way No known interaction 70

Oleic Acid + Whey Protein No documented interaction either way No known interaction 70

Oleic Acid + Lactase No documented interaction either way No known interaction 70

Oleic Acid + Bovine Collagen No documented interaction either way No known interaction 70

Oleic Acid + DHA No documented interaction either way No known interaction 70

Oleic Acid + Turmeric No documented interaction either way No known interaction 70

Oleic Acid + Fish Oil (EPA/DHA) No documented interaction either way No known interaction 70

Oleic Acid + Vitamin D3 Enhanced antioxidant protection and stability Works better together 82

Oleic Acid + Olive Oil Extract Synergistic cardiovascular and anti-inflammatory benefits Works better together 82

Oleic Acid + Omega-3 + Curcumin + Vitamin D Triple Anti-Inflammatory Formula Comprehensive fatty acid balance and health benefits Works better together 82

Dosage

With meals

Daily1-4g

Cardiovascular support2-4g daily

Anti inflammatory1-3g daily

Cholesterol management2-3g daily

General health1-2g daily

When to expect it

First Effects2-4 weeks for initial cardiovascular and inflammatory benefits

Peak Benefits8-16 weeks for sustained heart health and lipid improvements

Deficiency DevelopmentRare as body can synthesize oleic acid from other fats

Toxicity OnsetVery rare, mainly caloric excess concerns

How to measure it

$100-200

MarkerLipid panel, inflammatory markers (CRP), fatty acid profile

OptimalImproved cholesterol ratios, reduced inflammatory markers

Deficient belowPoor lipid profile, elevated inflammatory markers

FrequencyEvery 3-6 months for cardiovascular health monitoring

What actually reaches you

The label counts the carrier, your body does not

Absorption Very high 95 of 100 · best absorbed form of this compound

Delivered daily 2375 mg

Cost per 100 mg delivered $0.03 comparative — uses the absorption score, not a measured percentage

Works better with

3 documented

Vitamin E

Enhanced antioxidant protection and stability

Vitamin E prevents oleic acid oxidation and enhances benefits · level A

Polyphenols Olive

Synergistic cardiovascular and anti-inflammatory benefits

Olive polyphenols enhance oleic acid's cardioprotective effects · level A

Omega 3 Fatty Acids

Comprehensive fatty acid balance and health benefits

Balanced omega profile provides optimal inflammatory and cardiovascular support · level A

What not to take with Oleic Acid

2 documented

Trans Fats

Trans fats counteract oleic acid's cardiovascular benefits

Trans fats promote inflammation and cardiovascular disease · high significance

Excessive Omega 6

High omega-6 intake may reduce oleic acid's anti-inflammatory benefits

Imbalanced fatty acid ratios promote inflammatory pathways · moderate significance

Medication interactions

Discuss these with a pharmacist before combining

anticoagulants Minor

May have mild blood thinning effects

What to do: Monitor if on blood thinners

cholesterol-medications None

May enhance cholesterol-lowering effects

What to do: Beneficial combination

Available forms

bioavailability compared

High-Oleic Acid Supplements (Olive Oil Based) 95

High-Oleic Acid Supplements (Olive Oil Based): Heart health benefits, Anti-inflammatory, Well researched, Food-based sources

Food sources

before you supplement

Extra virgin olive oil 55-83% oleic acid content · 95

Avocados High oleic acid content · 90

Almonds and nuts Moderate to high oleic acid · 85

High-oleic sunflower oil 80%+ oleic acid content · 95

Too little

deficiency signs

Oleic acid deficiency is rare as body synthesizes it:
Poor cardiovascular health markers
Increased inflammatory markers
Suboptimal cholesterol ratios
Reduced insulin sensitivity
Poor cellular membrane function

Too much

toxicity signs

Extremely safe with minimal side effects:
Weight gain with excessive caloric intake
Digestive upset with very large doses
Oxidation products if improperly stored
Generally well tolerated by most people

Who benefits most

cardiovascular-health-support

Heart health optimization and cardiovascular disease prevention

2-4g daily (food sources preferred)

high-cholesterol-management

Cholesterol optimization and lipid profile improvement

2-3g daily with medical supervision

anti-inflammatory-support

Systemic inflammation reduction and inflammatory balance

1-3g daily

metabolic-health-optimization

Insulin sensitivity and blood sugar support

2-3g daily

mediterranean-diet-enhancement

Supporting Mediterranean diet benefits and healthy aging

2-4g daily from food sources

Where to buy it

compare forms first

Look for Oleic Acid at 1-4g per serving. The form that matters here is High-Oleic Acid Supplements (Olive Oil Based).

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What else affects it

Beyond other supplements

Trans fats

Trans fats counteract oleic acid's cardiovascular benefits

Trans fats promote inflammation and cardiovascular disease

Excessive omega 6

High omega-6 intake may reduce oleic acid's anti-inflammatory benefits

Imbalanced fatty acid ratios promote inflammatory pathways

How it works

Incorporates into cellular membranes improving fluidity and function
Reduces LDL cholesterol oxidation protecting against atherosclerosis
Modulates inflammatory pathways reducing pro-inflammatory cytokines
Enhances insulin sensitivity through improved membrane composition
Supports endothelial function and arterial health
Provides stable energy source with minimal inflammatory potential

Key findings

what the evidence supports

Extensive evidence for cardiovascular health benefits
Strong research on anti-inflammatory effects
Proven cholesterol and lipid profile improvements
Mediterranean diet research supports oleic acid benefits

Sources: NIH Examine.com · data reviewed 2026-08-01

Compiled by Denis, who maintains this database and holds no medical qualification — every figure here is sourced or derived, never asserted. How we calculate it →

Common questions

What are the benefits of Oleic Acid?

Documented effects: Cardiovascular health and protection; Anti-inflammatory effects; Cholesterol and lipid optimization; Insulin sensitivity and blood sugar support. Supports heart health and reduces cardiovascular disease risk

How much Oleic Acid should you take per day?

The common daily range is 1-4g. By goal — cardiovascular support: 2-4g daily; anti inflammatory: 1-3g daily; cholesterol management: 2-3g daily; general health: 1-2g daily.

When is the best time to take Oleic Acid?

With meals. First effects are typically reported within 2-4 weeks for initial cardiovascular and inflammatory benefits.

What are the side effects of Oleic Acid?

At excessive doses: Extremely safe with minimal side effects:, Weight gain with excessive caloric intake, Digestive upset with very large doses, Oxidation products if improperly stored, Generally well tolerated by most people. Safety rating at normal doses is 9 out of 10.

What should you not take with Oleic Acid?

Separate it from Trans Fats, Excessive Omega 6 by two to four hours. Trans fats counteract oleic acid's cardiovascular benefits

Does Oleic Acid interact with medications?

Documented interactions with anticoagulants, cholesterol-medications. Discuss these with a pharmacist before combining.

How do you know if you need Oleic Acid?

The marker is Lipid panel, inflammatory markers (CRP), fatty acid profile, optimal range Improved cholesterol ratios, reduced inflammatory markers. Common deficiency signs: Oleic acid deficiency is rare as body synthesizes it:, Poor cardiovascular health markers, Increased inflammatory markers, Suboptimal cholesterol ratios.

Taken for

52 Heart

Fish Oil (EPA/DHA) · EPA · Olive Oil Extract