Are linalool and lavender scented products giving people new contact allergies?
Yes. Aged linalool oxidizes into hydroperoxides that trigger real, immune-confirmed contact dermatitis.
What's actually in it
Linalool is the main scent in lavender and shows up in citrus, mint, and bergamot. It's also added to thousands of body washes, lotions, and cleaning products as part of "fragrance." Linalool itself isn't very allergenic. The trouble starts after the bottle has been open for months. Air turns linalool into hydroperoxides, which are strong skin sensitizers.
Old, half-empty bottles of scented products carry the most.
What the research says
A 2026 study in Contact Dermatitis exposed volunteers to repeated patches of linalool hydroperoxides. The hydroperoxides triggered real allergic contact dermatitis, confirmed with immune testing. The reactions held up over multiple exposures.
The team recommended testing for linalool hydroperoxides in patients with stubborn rashes that won't go away.
If you have sensitive skin or unexplained rashes, switch to fragrance-free body wash, lotion, and laundry. Discard old bottles of scented products: anything more than a year old has higher hydroperoxide levels. Pick brands that print a full ingredient list rather than hiding behind "parfum."
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Repeated Exposure to Hydroperoxides of Linalool Induces Immunologically Verified Allergic Contact Dermatitis. | Contact Dermatitis | 2026 |
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