Carrier Oils

Carrier Oils (Oleum)

Carrier oils are plant-derived oils used in the apothecary as a base for herbal preparations, particularly for topical applications.

They serve as the primary medium for infused oils, salves, balms, and massage blends, helping deliver fat-soluble plant compounds to the skin.

Carrier oils are valued for their stability, skin compatibility, and ability to absorb and carry herbal constituents.

What It Is

Carrier oils are fixed oils extracted from seeds, nuts, or fruits (such as olive, jojoba, or sweet almond).

In herbal practice, they function as a lipophilic (fat-based) solvent, extracting and holding fat-soluble plant compounds.

Unlike essential oils, carrier oils are non-volatile, mild, and used in larger quantities.

Appearance & Character

A well-quality carrier oil typically shows:

• Clear to lightly colored appearance (varies by oil)
• Smooth, fluid texture
• Mild or neutral aroma (some oils are more distinctive)
• Lightweight to rich feel depending on oil type

Examples:

· Almond

· Argan

· Avocado

· Castor

· Coconut (Regular & Fractionated)

· Grapeseed

· Jojoba

· Olive

· Rosehip

The oil should smell fresh and clean, never rancid or sour.

Best For

Carrier oils are most effective for:

• Oil infusions
• Salves and balms
• Massage oils
• Skin nourishment and protection
• Delivering fat-soluble herbal compounds

Different oils are chosen based on:

• Skin type
• Absorption rate
• Stability and shelf life

Solubility & Extraction Notes

Carrier oils extract lipophilic (fat-soluble) compounds, including:

• Essential oils
• Resins
• Oleoresins
• Fat-soluble vitamins and antioxidants
• Some anti-inflammatory compounds

They do not effectively extract:

• Minerals
• Tannins
• Mucilage
• Most water-soluble compounds

Carrier oils are the foundation of oil infusions, where extraction occurs over time.

Historical & Cultural Context

Carrier oils have been used for centuries across cultures, particularly in Mediterranean, Middle Eastern, and Ayurvedic traditions.

Olive oil, sesame oil, and other plant oils were traditionally infused with herbs to create healing oils, salves, and ritual preparations.

They remain a foundational component of herbal medicine due to their versatility and effectiveness in topical formulations.

In the Archive With…

Often used as a base in oil-based preparations, including:

Infused Oil
Salves & Balms
Beeswax
Calendula
Plantain

These materials and preparations are commonly used to support topical application, skin nourishment, and delivery of herbal compounds through the skin.

Shelf Life

Shelf life varies depending on the oil:

• Stable oils (olive, jojoba) — ~1–2+ years
• Less stable oils (sweet almond, grapeseed) — ~6–12 months

Factors that affect shelf life:

• Exposure to heat, light, and air
• Degree of processing
• Fatty acid composition

Store in:

• Cool, dark conditions
• Airtight containers

Rancidity is indicated by off or sour smell.

Preparation

Carrier oils are used as a base rather than prepared on their own.

In practice:

• Select an appropriate oil for the intended use
• Combine with herbs for infusion
• Use as the base for salves and balms
• Blend with essential oils when appropriate

Best practices:

• Use high-quality, fresh oils
• Choose oils appropriate for skin type and purpose
• Label and track shelf life
• Avoid overheating during infusion

Carrier oils form the foundation layer of many apothecary preparations.

Safety Notes

Carrier oils are generally safe for topical use.

Important considerations:

• Some individuals may have sensitivities (especially nut oils)
• Always patch test when trying a new oil
• Use fresh oils to avoid skin irritation from rancidity

They are widely used in both herbal and skincare applications.