Oregano
Solid evidence for antimicrobial. Not a miracle worker, but genuinely useful for the right person.
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Verdict
6/10 Promising
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Evidence
Grade B / 100+ Studies
Norans Kepals, Independent Researcher & Supplement Expert
March 1, 2026
The No-BS Summary
8 things. 60 seconds. Everything you need.
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WHAT IT DOES
A potent antimicrobial herb with carvacrol that fights pathogens and supports digestive health.
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DOES IT WORK?
Oregano (especially oil of oregano with high carvacrol) has genuine antimicrobial and antifungal activity. Clinical data supports its use against gut pathogens, SIBO, and Candida. The leaf powder is less potent than the oil, but the active compounds are real.
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HOW MUCH TO TAKE
500-1500mg dried herb or 100-200mg oregano oil daily
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COST
Budget-friendly. $20-35/month for quality brands.
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FIRST 24 HOURS
You might notice something within hours.
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AFTER A FEW WEEKS
Most people notice something by week 2-3.
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SAFETY
Few things to check: oil form can irritate gi tract, may interact with blood thinners. Worth mentioning to your doc.
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HOW IT FEELS
Effects vary person to person. Give it time.
2The Breakdown
Quick Answers
Dose-Response Curve
How effective is oregano at different doses? Here's what the research shows.
Effectiveness %
0
25
50
75
100
MIN 100mg
SWEET SPOT 200mg
PLATEAU 600mg
Dose (mg)
0-50%
Sub-therapeutic
<100mg
50-80%
Effective
100mg-200mg
~80%
Optimal
200mg
80%
Diminishing
>600mg
Moderate confidenceBased on clinical data + estimates
Source: Force et al. 2000 Phytother Res; Singletary 2010 Nutr Today review.Bottom line: Most research uses 200mg daily. Below 100mg, you're probably wasting money. Above 600mg, you're not getting extra benefit.
Dosing Guide
When
As directed
How
500-1500mg dried herb or 100-200mg oregano oil daily
Food
With or without food
Onset & Feel
INSTANT
Effects vary
Effects vary person to person. Give it time.
Cycle
As needed
How to Take It
Oregano comes in several formats. Pick what fits your lifestyle.
Capsules/Tablets
Pre-measured doses, easy to take.
✓ Convenient✓ No taste✓ Portable✗ More expensive✗ May need multiple
Powder
Mix with water or a shake.
✓ Cheapest✓ Flexible dosing✗ Needs mixing✗ Taste varies
Softgels
Oil-based for fat-soluble nutrients.
✓ Better absorption for fats✓ No taste✗ Larger pills
Pick this:
Capsules for convenience, powder for value.
Skip this:
Check for unnecessary fillers and additives.
Delivery affects convenience and cost, not usually effectiveness.
Did you know?
Many studies and counting.
Heads Up
Generally safe at recommended doses. Talk to your doc if you have concerns. Check with your doc if: Oil form can irritate GI tract, May interact with blood thinners, Not for long-term high-dose use.
3Deep Dive
The Science, Simplified
For those who want the full picture
Oregano has emerging evidence.
Trust Signals
Grade B
Evidence
50+
Studies
30
Human Trials
0
Meta-analyses
👍 Strong evidence. Most claims hold up under scrutiny.
Mechanism of Action
Carvacrol and thymol disrupt bacterial cell membranes. Strong antifungal activity against Candida species. High ORAC antioxidant value. Inhibits inflammatory NF-kB pathway.
Research Summary
Scientific consensus: undefined/10.
Consensus: /10MODERATE Evidence
Origins & Manufacturing
Where does oregano come from? Let's get nerdy.
How It's Made
Manufacturing process varies by supplier.
What to Look For
✓ Third-party tested✓ GMP certified
Drug & Supplement Interactions
4For You
Is Oregano right for YOU?
Get a personalized verdict based on your health profile.
Products with Oregano
Supplements that contain this ingredient
Medical Disclaimer
This content is for informational purposes only and is not intended as medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting any supplement regimen, especially if you have medical conditions or take medications. ARE Supplements does not endorse any specific products.