Lin Z, Niu Y, Jiang Y, et al. - In this exploratory analysis based on a pilot randomised, double‐blind, placebo‐controlled trial, researchers assessed the potential skin protective effects of fish‐oil supplementation against PM_2.5 exposure. Between September 2017 and January 2018, 65 healthy young adults in Shanghai, China, were enrolled. Study participants were randomly assigned to intake either 2.5 g/day of fish oil or placebo for consecutive 4 months. Data reported that the 24‐h average PM_2.5 concentration was 34.68 ± 15.83 μg/m³. Findings suggested that dietary fish‐oil supplementation can improve biomarkers of skin inflammation and oxidative‐stress response to short‐term PM_2.5exposure.