Mentha Arvensis Extract

Mentha arvensis (wild mint) extract commonly contains menthol and related terpene compounds that provide a cooling sensation but are well-documented to cause stinging, erythema, and irritant contact dermatitis in sensitive or eczematous skin, even at relatively low leave-on concentrations. Mint-derived botanicals also carry a non-trivial risk of allergic contact dermatitis due to fragrance-like constituents, and irritation risk increases substantially when combined with other actives or when the skin barrier is compromised. Given the frequency of adverse reactions in reactive populations and the difficulty of standardizing extract composition, I score it as a significant irritant requiring caution. Safety Notes: In mass-market leave-on skincare, Mentha Arvensis Extract is often used at trace levels (~0.0001–0.05%) as a cooling/fragrance-supporting botanical within complex blends, where higher levels increase irritation risk. More noticeable “cooling” rinse-off cleansers, masks, and some OTC body/foot or scalp products commonly run ~0.1–1%. The highest consumer-available levels observed are around ~1–2% in strongly sensorial, mint-focused formulations (typically rinse-off or localized-use leave-on), with practical limits driven by sensitization/irritancy and the need to control overall mint/menthol impact (not a specific global regulatory cap for the extract, but IFRA/fragrance and general safety considerations constrain use).