What it is
This is the essential oil of lime, obtained from the fruit of Citrus aurantifolia by cold expression or distillation. It is composed largely of volatile terpenes such as limonene and contributes a fresh, sharp citrus scent, so it is used mainly as a fragrance or scent-masking ingredient. In sunscreen and skincare it serves an aromatic role rather than a UV-protective one.
Safety & warnings
Lime oil contains limonene and related terpenes, which are recognized fragrance allergens and can sensitize susceptible skin. Cold-pressed (expressed) citrus oils can also contain furocoumarins that make skin more sensitive to UV light, so use in leave-on sun-exposed products warrants caution; distilled or furocoumarin-reduced grades lower this concern.
Origin & sourcing
Natural; an essential oil obtained from the peel and fruit of lime, Citrus aurantifolia, by cold pressing or distillation.
Questions everyone asks
Why is lime oil added to sunscreen?
It is used as a fragrance to provide a fresh citrus scent, not for sun protection.
Can citrus oils make skin sensitive to sunlight?
Cold-pressed citrus oils can contain furocoumarins that increase sensitivity to UV light, so caution is reasonable in sun-exposed products.