Lyral, a common fragrance ingredient, triggered allergic reactions in 89% of people who were already sensitive to it when exposed at normal cosmetic product levels. The study found that even low doses caused reactions in most sensitized individuals, suggesting current usage amounts in beauty products are risky for people with fragrance allergies.

Researchers tested 18 people with known Lyral sensitivity and 7 controls using repeated skin applications of different Lyral concentrations over 4 weeks to see what doses would trigger allergic reactions.

Funding not disclosed in abstract