How to Make Oregano Oil from Dried Oregano

By Priya Sharma · January 24, 2026

To make oregano oil from dried oregano, steep dried oregano leaves in a high-quality carrier oil like olive or MCT oil for 5–7 days at room temperature or use gentle heat over 24–48 hours. Strain and store in a dark glass bottle away from light and heat to preserve potency.

Why Make Oregano Oil at Home?

Creating your own oregano oil allows you to control ingredient quality, avoid preservatives, and produce a natural remedy rich in carvacrol and thymol—compounds known for antimicrobial and antioxidant properties. Dried oregano is widely available and more concentrated than fresh, making it ideal for extraction.

Benefits of Oregano Oil

Natural antibacterial and antifungal properties
Supports respiratory and immune health
Rich in antioxidants
Versatile for topical or diluted internal use

Choosing the Right Dried Oregano

The effectiveness of homemade oregano oil depends heavily on starting material. Not all dried oregano is equal in essential oil content.

What to Look For

Botanical source: Origanum vulgare or Origanum compactum have the highest carvacrol levels
Organic certification: Ensures no pesticides or additives
Packaged with essential oil content data: Premium brands list carvacrol percentage (aim for 60%+)
Freshness: Check harvest date; older herbs lose volatile oils

Step-by-Step Guide to Making Oregano Oil

Two primary methods exist: cold infusion (longer, gentler) and warm infusion (faster, more efficient). Both yield effective results.

Cold Infusion Method

Fill a clean glass jar with 1 cup of crushed dried oregano
Pour 1.5 cups of carrier oil (e.g., olive, almond, or MCT oil) over the herb
Seal tightly and place in a cool, dark area
Shake daily for 5–7 days
Strain through cheesecloth into a sterilized amber glass bottle
Label and store in refrigerator for up to 6 months

Warm Infusion Method

Combine 1 cup dried oregano and 1.5 cups carrier oil in a double boiler
Maintain low heat (below 100°F / 38°C) for 24–48 hours
Stir occasionally to enhance extraction
Cool, then strain into amber bottle
Store refrigerated

Best Carrier Oils for Oregano Oil Extraction

The carrier oil impacts shelf life, absorption, and compatibility. Choose based on intended use.

Carrier Oil	Smoke Point (°F)	Shelf Life	Best For	Carvacrol Solubility
Olive Oil	375–405	18–24 months	Topical & occasional internal use	High
MCT Oil	320	12–24 months	Internal use, faster absorption	Very High
Jojoba Oil	370	5+ years	Topical applications only	Moderate
Almond Oil	420	12 months	Skin formulations	High
Grapeseed Oil	420	6–12 months	Light texture, short-term use	Moderate

Table data source:1, 2

MCT oil provides superior solubility for carvacrol, enhancing bioavailability. Olive oil remains popular due to availability and safety profile. Jojoba, though technically a wax, offers exceptional stability for topical blends.

Storage and Shelf Life Tips

Proper storage preserves potency and prevents rancidity.

Use dark amber or cobalt glass bottles
Keep in a cool, dark place (refrigeration extends life)
Avoid moisture contamination—always use clean utensils
Label with date and ingredients

Homemade oregano oil lasts 3–6 months at room temperature, up to 1 year refrigerated. Discard if cloudy, moldy, or off-smelling.

Safety and Usage Guidelines

Oregano oil is potent. Always dilute before use.

Recommended Dilution Ratios

Topical: 1–3% concentration (5–15 drops per tablespoon carrier oil)
Internal: Only with food-grade oils; max 1–2 drops in honey or water, not exceeding 2 weeks continuously
Not for children under 6, pregnant/nursing women, or those on blood thinners without medical advice

Frequently Asked Questions About Making Oregano Oil

Can I use fresh oregano instead of dried?

Fresh oregano contains more moisture, which can promote bacterial growth and spoilage during infusion. Dried oregano is preferred because it has higher concentration of essential oils and reduces risk of contamination.

How do I know if my oregano oil is strong enough?

Strong oregano oil has a sharp, pungent aroma and slightly warming sensation when diluted and tested on skin. For accuracy, purchase high-carvacrol oregano (60%+) and use MCT oil for optimal extraction efficiency.

Is homemade oregano oil as effective as commercial versions?

When made with high-quality, lab-tested dried oregano and proper technique, homemade oil can be equally effective. However, commercial products often standardize carvacrol levels (e.g., 70–80%), offering consistency that DIY batches may lack.

Can I reuse the oregano after straining?

Used oregano loses most of its volatile compounds and is not recommended for re-infusion. It can be composted or used as a mild garden mulch, but will not yield significant oil in subsequent batches.

What’s the best way to test for allergies before using oregano oil?

Perform a patch test: Apply 1 drop of diluted oil (1% solution) to inner forearm. Cover and wait 24 hours. If redness, itching, or swelling occurs, discontinue use. Never apply undiluted oregano oil directly to skin.