Botanical

Oregano Oil

Also known as: Oil of oregano, Oregano essential oil, Carvacrol

Evidence

Potent antimicrobial herb with carvacrol and thymol compounds effective against bacteria, fungi, and some viruses.

Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.

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Primary uses

Antimicrobial
Antifungal
Respiratory support
Immune support

How it works

Carvacrol disrupts microbial membranes
Thymol adds antimicrobial action
Antioxidant effects
May have antiviral activity

Dosage

Typical range: 100-200mg standardized to 60-80% carvacrol, 1-3x daily
Timing: With food
With food: Yes, reduces GI burn
Duration: Short-term use (2-6 weeks)
Special populations: Those with suspected microbial issues

Forms

Enteric-coated capsules
Liquid drops
Softgels

Safety

Common side effects

GI burning/upset
Heartburn
Nausea

Contraindications

Pregnancy
Allergy to Lamiaceae family
GERD

Evidence notes

In vitro evidence strong, clinical limited

Grade B: Some human trials support key claims; further confirmation needed.

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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.