Essential Oil
Essential Oil — a concentrated plant extract that captures the aromatic compounds of a flower, leaf, peel, or other botanical, usually obtained through distillation or cold pressing. In skincare it is used for scent and sometimes for claimed skin benefits, but its potency means it can also cause irritation or sensitization. Because it is highly concentrated, it is typically used in small amounts and diluted within a formula.
Key points
- Essential oils are volatile, concentrated botanical extracts most often produced by steam distillation or cold pressing.
- They contribute natural scent and are marketed for various skin and sensory benefits.
- Some, such as citrus oils, contain compounds that can increase sun sensitivity or cause phototoxic reactions.
- Despite being natural, essential oils can be potent irritants or allergens and are used at low concentrations.
Frequently asked
Are essential oils safe for skin because they are natural?
Natural does not automatically mean gentle, and several essential oils are known irritants or allergens, so they should be properly diluted and patch tested.
Why can some essential oils increase sun sensitivity?
Certain oils, especially cold-pressed citrus oils, contain furocoumarins that can react with sunlight and cause phototoxic irritation or discoloration.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
