Essential Oils

What it is

Essential oils are aromatic materials made from plants, commonly extracted from leaves, flowers, peel, seeds, or wood. They are concentrated and volatile, which means they contribute a recognizable scent and can evaporate. Their ingredient-list names often include the plant’s botanical name and a plant part, such as flower oil or leaf oil. Some are labeled with a familiar common name instead.

Do not confuse essential oils with carrier oils. Carrier oils such as jojoba or rosehip are generally nonvolatile oils used as emollients. Essential oils are a different ingredient group, even though both come from plants and both may have “oil” in the name. A face-oil formula can contain carrier oils, essential oils, both, or neither. See the face oil guide for how to read those formulas as a category.

What it does

• Adds an aromatic scent. This is a common reason essential oils appear in cosmetics.
• Contributes plant-derived components. Each oil has its own composition, depending on the plant and how the material is produced.
• May serve other formula roles. The reason for using one depends on the product and the particular oil, so the plant name alone does not explain the whole formula.

Who it suits

An essential oil may suit someone who likes scented products and has no known allergy to that ingredient. If you want scent-free skincare, or you have a known allergy to a particular essential oil or one of its components, you may prefer to avoid products listing it. Sensitive or reactive skin may also be more comfortable with a simpler, unscented formula. “Natural” describes origin, not how gentle an ingredient will feel on your skin.

Essential oils can contain naturally occurring fragrance allergens. Their plant source does not remove that possibility, and different oils have different compositions. If you have had a reaction to a specific botanical ingredient, look for its scientific and common names on the label. If a product leaves your skin itchy, burning, or uncomfortable, stop using it; recurring reactions are worth discussing with a dermatologist.

What to pair it with, and what not to

There is no skincare ingredient that needs essential oil added to it. If your goal is simply to soften skin, a carrier-oil formula without added aromatic ingredients is another option. Avoid layering several new scented products at once if you are trying to identify a trigger. Keep your routine familiar, check the full ingredient list, and follow the product directions. An essential oil is not interchangeable with a face oil, and the word “oil” alone does not tell you what is in the bottle.

Skin Realist check: A botanical origin story is not a compatibility test. If your routine works better without scent, you do not owe an ingredient a try just because it came from a plant.