Overview

• The human oxidation field, a protective layer of hydroxyl radicals formed by ozone reacting with skin oils, was first identified in 2022.
• A new study published in *Science Advances* confirms that CK One perfume reduces the oxidation field by 86%, while Unilever’s Neutral Sensitive Skin lotion reduces it by 34%.
• Disruption of the oxidation field can alter air chemistry in the breathing zone, potentially affecting pollutant intake and health outcomes.
• Researchers found that ethanol in perfume and phenoxyethanol in lotion interfere with the OH radicals through distinct mechanisms, diminishing their cleansing properties.
• The health implications of reducing the oxidation field remain unclear, with scientists calling for further research to assess potential risks or benefits.