Last verified: 17 days ago
Safflower Oil
Also known as: Carthamus tinctorius oil, high-linoleic safflower oil, high-oleic safflower oil, LA oil
Evidence under review. — Not yet rated
Plant oil high in omega-6 fats. Limited evidence for health benefits; often used as a placebo in studies.
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What it does
Safflower oil is a vegetable oil rich in linoleic acid (LA), an omega-6 polyunsaturated fatty acid. In clinical trials, supplementation at 15–20 g/day was associated with reductions in some...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
No established dose
What the Science Says
Safflower oil is a vegetable oil rich in linoleic acid (LA), an omega-6 polyunsaturated fatty acid. In clinical trials, supplementation at 15–20 g/day was associated with reductions in some circulating inflammatory markers like TNF and certain chemokines, though these changes were not significantly different from those seen with omega-3 fish oil. It is frequently used as a neutral control oil in supplement research, which limits conclusions about its independent benefits.
What It Doesn't Do
Not proven to be anti-inflammatory compared to fish oil — both showed similar systemic effects in direct comparison. No evidence it supports heart health, weight loss, or muscle building on its own. Don't confuse 'used in studies' with 'proven to work.' Being a placebo control in trials is not a health benefit.
Evidence-Based Benefits
May reduce circulating TNF and certain chemokines in adults with abdominal obesity.
Weak EvidenceEffective at: 15-20 g/day
Supporting studies (click to view on PubMed):
Increases linoleic acid content in adipose tissue and red blood cell membranes when supplemented.
Weak EvidenceEffective at: 15-20 g/day for 7 weeks
Supporting studies (click to view on PubMed):
Absorption & Bioavailability
Good — dietary fats from safflower oil are well absorbed; linoleic acid is incorporated into red blood cell membranes and adipose tissue, confirmed by fatty acid profiling in clinical studies.
Red Flags to Watch For
- High omega-6 intake may promote tissue-level pro-inflammatory gene expression, even if systemic markers improve — one study found upregulation of inflammatory genes in adipose tissue after safflower oil supplementation
- Animal research suggests a high omega-6 seed oil diet combined with cannabis smoking worsened cardiac strain and suppressed anti-inflammatory lipid mediators — relevance to humans unclear but worth noting
- Safflower oil is routinely used as a placebo in clinical trials, meaning many 'benefits' attributed to it may simply reflect normal biological variation
- No established therapeutic dose exists for safflower oil as a supplement; most products on the market lack clinical dosing guidance
Products Containing Safflower Oil
See how Safflower Oil is used in these analyzed products:
Frequently Asked Questions
What does Safflower Oil do?
Plant oil high in omega-6 fats. Limited evidence for health benefits; often used as a placebo in studies.
What is the effective dose of Safflower Oil?
No established dose
Is Safflower Oil safe?
High omega-6 intake may promote tissue-level pro-inflammatory gene expression, even if systemic markers improve — one study found upregulation of inflammatory genes in adipose tissue after safflower oil supplementation
What doesn't Safflower Oil do?
Not proven to be anti-inflammatory compared to fish oil — both showed similar systemic effects in direct comparison.
Research Sources
- PubMed
- NIH DSLD
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25