Infused Oil

Best For

Oil infusions are most effective for herbs that contain:

• Aromatic compounds

• Essential oils

• Resins and oleoresins

• Fat-soluble antioxidants

• Anti-inflammatory compounds

They are commonly used for herbs applied externally for skin and tissue support.

Examples in this archive include:

• Calendula

• Plantain

• Rose

Oil extraction is less effective for minerals, mucilage, and highly water-soluble compounds.

Appearance & Character

A well-made infused oil usually shows clear visual signs of extraction:

• Color shifts toward the plant’s pigments

• Aroma reflects the herb used

• Texture remains smooth and fluid

Examples:

• Calendula oil often turns deep golden orange

• Plantain oil may take on a green-olive color

• Rose oil carries a gentle floral scent

The oil should remain clear and fresh smelling, never sour or rancid.

Preparation

Two primary methods are commonly used: slow (no-heat) infusion and gentle heat infusion.

Both extract the plant’s fat-soluble compounds into the oil.

Herb Preparation

Before infusing:

• Use dried herbs whenever possible

• If using fresh herbs, allow them to wilt 12–24 hours

• Chop or crumble herbs to increase surface area

Typical starting ratio:

1 part dried herb : 4–5 parts oil

No-Heat (non-solar) Infusion - UV rays can degrade plant compounds over time.

A traditional slow extraction method that preserves delicate aromatic compounds.

Steps

1. Fill a clean glass jar halfway with dried herb.

2. Cover completely with oil.

3. Stir to release trapped air bubbles then top off.

4. Seal the jar.

5. Place in a warm dark location like a cabinet or out of direct sunlight.

6. Shake gently every day.

Extraction time

4–6 weeks

When finished, strain and bottle.

Gentle Heat Infusion

A faster method useful when medicine is needed sooner.

Steps

1. Combine herb and oil in a heat-safe jar or double boiler.

2. Warm gently at 95–120°F (35–50°C).

3. Maintain heat for 2–6 hours.

4. Stir occasionally.

Avoid overheating. Oil should never fry or smoke.

Straining

After extraction:

1. Strain through cloth or a fine filter.

2. Press herbs to recover as much oil as possible.

3. Allow sediment to settle before final bottling.

Store in clean, dry glass containers.

Best Practices for Strong Infusions

For a potent, clean extraction:

• Use fresh, high-quality carrier oils

• Keep herbs fully submerged

• Avoid moisture contamination

• Store oils away from heat and light

For stronger medicine, some herbalists perform a double infusion, where fresh herbs are infused into the finished oil a second time.

Historical & Cultural Context

Infused oils appear throughout traditional medicine systems across cultures.

Ancient Mediterranean herbal traditions frequently used olive oil infusions for skin healing and wound care. Oils infused with herbs such as calendula, plantain, and St. John’s wort were valued for soothing injured or inflamed tissue.

In many traditions, oil also carries symbolic meaning:

Preservation and nourishment

Healing and protection

Anointing and blessing

These associations reflect oil’s ability to carry plant medicine into the body through the skin.

In the Archive With…

Herbs commonly prepared as infused oils include:

Carrier Oils
Beeswax
Calendula

Lavender
Plantain
Chamomile

These preparations and materials frequently appear in formulations intended to support topical application, skin nourishment, and oil-based extraction.

What It Is

An herbal infused oil is a preparation where herbs are macerated in a carrier oil so that fat-soluble plant constituents dissolve into the oil.

Unlike teas or tinctures, oil infusions primarily extract compounds that dissolve in fats rather than water or alcohol. The finished oil can be applied directly to the skin or used as the base for other topical preparations.

Infused Oil (Oleum Infusum)

Herbal infused oils are made by soaking plant material in a carrier oil so the oil absorbs the plant’s fat-soluble compounds. The resulting preparation captures the scent, color, and medicinal qualities of the herb and is used primarily for topical remedies.

Infused oils are among the oldest forms of herbal medicine. They form the base for many traditional preparations including salves, balms, liniments, and massage oils.

Solubility & Extraction Notes

Different solvents extract different types of plant compounds.

Oil infusions primarily dissolve lipophilic (fat-soluble) compounds, including:

• Essential oils

• Resins

• Oleoresins

• Fat-soluble antioxidants

• Some anti-inflammatory constituents

They are less effective for extracting:

• Minerals

• Tannins

• Mucilage

• Many alkaloids

Because water promotes spoilage, herbs used for oil infusions are typically dried or wilted before use.

Shelf Life

Shelf life depends largely on the carrier oil used.

Typical range:

6–12 months

Approximate stability of common oils:

• Olive oil — ~1 year

• Sunflower oil — ~1 year

• Sweet almond oil — ~6–12 months

• Grapeseed oil — ~6 months

• Jojoba oil — several years (very stable)

To extend shelf life:

• Store in dark glass bottles

• Keep in a cool, dark place

• Avoid introducing water

• Optional: add 0.5–1% vitamin E to slow oxidation

Discard oils that smell rancid, sour, or stale (think crayons).

Safety Notes

Infused oils are generally used externally.

Important precautions:

• Ensure herbs are fully dry or wilted to prevent mold.

• Keep plant material completely submerged in oil during infusion.

• Avoid using oils on deep or infected wounds without guidance.

• Some herbs may cause skin sensitivity or allergic reactions.

Always test a small amount on the skin before widespread use.