American Basil

BotanicalBest with a meal

What is it

'American basil' is an informal name applied to several culinary basil cultivars, most commonly Ocimum basilicum varieties grown in North America. The label sometimes refers to Ocimum americanum (lime basil or hoary basil), a distinct species used in cuisines of East and Southeast Asia and in traditional medicine.

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Culinary and antioxidant

Good Evidence

Basil contributes flavor and modest antioxidant compounds to a varied diet.

Specific medicinal claims for American basil

Mixed Evidence

No high-quality clinical trials in humans support specific medicinal claims for American basil. (Tulsi/holy basil has more evidence as a separate species.)

How it works

Basil leaves contain essential oils (linalool, eugenol, methyl chavicol, limonene), flavonoids, and rosmarinic acid. These compounds have shown antimicrobial, antioxidant, and modest anti-inflammatory activity in laboratory studies. Culinary use provides small amounts of vitamin K, manganese, and trace nutrients. Most clinical research on Ocimum species focuses on Ocimum sanctum (holy basil, tulsi) rather than American or sweet basil. Sweet basil clinical data are sparse beyond food and flavor use.

Dosage

No RDA. Culinary use is unrestricted. Standardized extracts (typically for tulsi rather than American basil) vary by product.

When and how to take it

Used as a culinary herb at any meal. Concentrated extracts (if used) are typically taken with food.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Fresh or dried leaves (culinary)

Standard culinary use.

Essential oils volatilize with heat.

Basil essential oil

Aromatic and topical use.

Concentrated; not for internal use without medical guidance.

Safety

Safe in culinary amounts. Essential oil should not be ingested in concentrated form. Some Ocimum essential oils contain estragole (methyl chavicol), which is genotoxic in animal studies at high doses; this is not a concern at food intakes.

Who should be cautious

Pregnancy and breastfeeding compatible with culinary amounts. Avoid concentrated essential oil internally. People on anticoagulants should avoid high-dose concentrated basil extracts.

Interactions

Theoretical mild antiplatelet effects at very high concentrated extract doses. No significant interactions at culinary intake.

Food sources

Fresh basil leaves

Amount
low calorie; trace vitamin K and manganese
%DV
—

Frequently asked questions

Is American basil the same as Italian sweet basil?⌄

Often essentially yes (both are cultivars of Ocimum basilicum). Sometimes 'American basil' refers to Ocimum americanum, a related but distinct species.

Is basil tea safe daily?⌄

Standard culinary teas are safe. Avoid concentrated essential oil products taken internally.

References

American Basil on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on American Basil (PubMed search) — PubMed link

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.