Vegetable oils used to dilute essential oils for safe skin use are called:

• A. Base oils
• B. Fragrance oils
• C. Essential oils
• D. Solvents

Answer: (A)

Using base oils as carriers is essential for safe skin use of essential oils. Essential oils are highly concentrated, and applying them directly can irritate or sensitize the skin. Diluting them in vegetable oils—often called carrier oils or base oils—lowers the concentration, improves spreadability, and adds moisturizing properties, making blends gentler and safer for most skin types.

Common base oils include sweet almond, jojoba, grapeseed, apricot kernel, hazelnut, and fractionated coconut oil. They provide a neutral, gentle medium that helps the aromatic compounds absorb more evenly without overwhelming the skin.

Fragrance oils are designed for scent and may contain additives that aren’t ideal for skin contact. Essential oils are the concentrated plant extracts themselves, not a diluent. Solvents are not standard skin diluents for aromatherapy blends and can be harsh or unstable on the skin.