Serums & Essences · 16/06/2026
Why fragrance in skincare is the invisible trigger most sensitive skin routines overlook
Up to 30% of sensitive skin reactions to skincare products are caused by fragrance — a category of ingredients that appears in most toners and first-step products under dozens of names.
Fragrance in skincare: why it causes reactions in sensitive skin
Cosmetic fragrance — whether synthetic parfum or "natural" botanical fragrances like essential oils, citrus extracts and floral waters — contains dozens to hundreds of individual chemical compounds, many of which are recognised skin sensitisers. The EU and international dermatology bodies list over 80 specific fragrance chemicals as known allergens. In a first-step toner applied immediately after cleansing to a barrier-disrupted, highly receptive skin surface, fragrance compounds penetrate efficiently — making the toner position one of the highest-risk product slots in a routine for triggering fragrance sensitisation.
Identifying fragrance in ingredient lists: what to look for
Fragrance in product ingredients is listed as "parfum", "fragrance", or by the name of the specific botanical (lavender oil, bergamot extract, rose water, citrus aurantium). "Unscented" products may still contain masking fragrances to neutralise the smell of active ingredients — only "fragrance-free" guarantees no added fragrance compounds. When eliminating fragrance from a sensitive skin routine, the toner and first-step products are the priority because of their first-contact, high-absorption position in the routine sequence.
Building a fragrance-free K-beauty first-step toner routine
A fragrance-free, alcohol-free first-step toner should be the anchor of a sensitive skin K-beauty routine. Applied immediately after cleansing to slightly damp skin, pressed in with palms (not cotton pads that absorb product), it delivers the first hydration layer without any potential sensitising compounds. This makes it safe to use as a multi-application toner (the K-beauty 7-skin method, applying several layers of toner) without increasing the risk of a reaction — each layer adds only hydrating, barrier-compatible ingredients.
Dear, Klairs Supple Preparation Unscented Toner 180ml — available on BuyBeautyKorea →
