Citral

If a scent could wear a bright yellow raincoat, citral would probably be it. It’s one of the main molecules responsible for that sharp, fresh, lemony smell you get from citrus peels, lemongrass, and several other essential oils. Chemically speaking, it’s a fragrance component rather than a skin care “active,” so its job is mostly to make a product smell good, not to give you the kind of skin benefits you’d expect from things like glycerin or niacinamide.

That said, citral has a bit of a reputation. In patch tests, fragrance allergens are a frequent trigger for contact dermatitis, and citral is one of the 26 fragrance allergens that must be listed separately in the EU when present above certain levels. That rule exists for a reason: even though many people tolerate it just fine, sensitized skin can react with redness, itching, or a rash. In a fragrance mix, it can be a sneaky one, because you may not notice it until your skin starts acting dramatic.

You’ll sometimes find citral naturally in plant-derived ingredients, but don’t let the “natural” label lull you into a false sense of security. Natural essential oils can still be irritants, and citral is one of the compounds behind that. It’s also worth saying that people searching for things like citrulline, citrulline malate, citrulline and arginine, or even citralka syrup are looking at completely different substances, so any supposed “benefits” don’t transfer here. Citral is not a supplement, not a medicine, and definitely not related to citalopram or citra lock despite the name confusion that search engines love to create.

Bottom line: citral is a fragrant lemony molecule with real sensitizing potential. If your skin is sensitive, reactive, or already annoyed by perfume ingredients, it’s smart to keep an eye out for it on ingredient lists. If your skin is happy with fragrance, you may never notice it at all — which, honestly, is the best outcome for an ingredient whose main ambition is to smell like a very convincing lemon.

It’s a common fragrance ingredient that smells like lemon and has a bittersweet taste.  It can be found in many plant oils, e.g. lemon, orange, lime or lemongrass. 

It’s one of the “EU 26 fragrances” that has to be labelled separately (and cannot be simply included in the term “fragrance/perfume” on the label) because of allergen potential. Best to avoid if your skin is sensitive.