Peppermint oil
Mentha Piperita Oil
Adds scent.
What it is
An essential oil obtained from the whole peppermint plant. EU rules require it to be named on the label when present above set levels.
Gives the product a minty scent and leaves a fresh feeling on the skin.
What it does in a formula
Why some people watch for it
Essential oils are plant fragrance. People who avoid fragrance often avoid them too, and some find them irritating on sensitive skin.
Some people prefer unscented products, and people with sensitive skin often look for fragrance because it is one of the ingredient types most often linked to skin reactions.
The EU singles out these substances because some people are allergic to them. People who know they react to one can use this list to check a label.
What official sources say
A fragrance allergen: EU labels must name it above 0.001% in leave-on and 0.01% in rinse-off products.
Regulation (EC) No 1223/2009, Annex III: list of substances which cosmetic products must not contain except subject to the restrictions laid down, retrieved 2026-10-09