Oregano Oil
Botanical
Also known as: Oil of oregano, Oregano essential oil, Carvacrol
B
Grade B💊 100-200mg standardized to 60-80% carvacrol, 1-3x daily🎯 4 primary uses🔗 3 synergies⚠️ Review warnings
Levels upVitality+50 pts
Overview
Potent antimicrobial herb with carvacrol and thymol compounds effective against bacteria, fungi, and some viruses.
Primary Uses
AntimicrobialAntifungalRespiratory supportImmune support
Frequently Asked About Oregano Oil
How much Oregano Oil should I take?
The typical effective range is 100-200mg standardized to 60-80% carvacrol, 1-3x daily. Individual needs vary based on age, body weight, diet, and goals — start at the lower end and adjust based on response. Always consult a healthcare provider before starting a new supplement.
When is the best time to take Oregano Oil?
With food. Consistency matters more than perfect timing — pick a daily anchor (e.g. with breakfast or before bed) and stick with it.
Should I take Oregano Oil with food?
Yes, reduces GI burn.
Does Oregano Oil interact with medications?
Yes — known interactions include Blood thinners (may enhance), Diabetes medications, and Iron supplements (may reduce absorption). If you take any prescription medication, talk to your doctor or pharmacist before starting Oregano Oil.
What does Oregano Oil pair well with?
Oregano Oil stacks well with Caprylic acid, Garlic, and Probiotics (after) — these combinations either improve absorption or work synergistically toward common goals.
Who should not take Oregano Oil?
Oregano Oil should be avoided or used with caution by people with Pregnancy, Allergy to Lamiaceae family, and GERD. Pregnant or breastfeeding women should consult a healthcare provider before use.
What are the side effects of Oregano Oil?
Most people tolerate Oregano Oil well. The most commonly reported side effects are GI burning/upset, Heartburn, and Nausea. Side effects are usually dose-dependent — lowering the dose often resolves them.
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
Research & Studies
Search the literature now
We haven’t curated landmark studies for Oregano Oilyet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.
Mechanism of Action
- • Carvacrol disrupts microbial membranes
- • Thymol adds antimicrobial action
- • Antioxidant effects
- • May have antiviral activity
Evidence Quality
Evidence Grade B
In vitro evidence strong, clinical limited
Safety & Contraindications
Serious Warnings
- • Can damage gut microbiome with prolonged use
- • Skin irritation if applied undiluted
Contraindications
- • Pregnancy
- • Allergy to Lamiaceae family
- • GERD
Common Side Effects
- • GI burning/upset
- • Heartburn
- • Nausea
Pregnancy & Breastfeeding
Avoid - may be uterine stimulant
Liver & Kidney Notes
Monitor with prolonged use
Interactions
💊 Medications
- • Blood thinners (may enhance)
- • Diabetes medications
- • Iron supplements (may reduce absorption)
🧪 Supplements
- • Often combined with caprylic acid for candida
🍽️ Food & Alcohol
- • Take with food always
Stacking & Synergies
Pairs Well With
Avoid Combining With
Best Goal Synergies
AntimicrobialCandidaSIBO
Buying Guide
What to Look For
- • High carvacrol content
- • Enteric coating preferred
- • Third-party tested
Standardization Markers
Carvacrol percentage (60-80%)Thymol content
Adulteration risk
Low
Practical Notes
- • Short-term use only
- • Always dilute if using topically
- • Follow with probiotics
Tags
antimicrobialantifungaloilrespiratory
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Last reviewed: June 2026 by the Formulate Research Team. Sources cited above; methodology and scoring criteria published here.
Cite this page
Formulate Research Team. (2026, June). Oregano Oil — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/oregano-oil
Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.