Supplement
Carnosic acid
SaveA phenolic diterpene from rosemary and sage with Nrf2-activating antioxidant and potential neuroprotective properties.
Quick verdict
Interesting Nrf2 activator in vitro but human supplementation data are very limited. Rosemary extract is the practical delivery form.
Evidence score
A rough internal score reflecting quantity, quality, and consistency of human evidence. Not a clinical recommendation.
What the research shows
Activates Nrf2 pathway in cell models. Rodent studies show memory improvement and neuroprotection. Rosemary extract standardised for carnosic acid is used in food preservation due to antioxidant properties. Human clinical trials are minimal.
Benefits
- Nrf2 pathway activator
- Neuroprotective in animal models
- Natural antioxidant with food-industry validation
Dosage notes
No established human dose. Rosemary extracts standardised to 10–20% carnosic acid at 200–500 mg are used in research.
Side effects
- Possible blood pressure changes
- GI upset at high doses
Who should be cautious
High-dose rosemary extracts may affect blood pressure and coagulation. Not studied in pregnancy.
What this page cannot tell you
Nearly all data are preclinical. Translating antioxidant food-preservation properties to human health benefits is a leap.
Leaderboard scores
- Longevity28
- Memory25
- Focus22
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