In the UK, expired beauty products are a health threat. Dermatologist Dr. Sweta Rai warns they can harbor harmful chemicals like benzene, capable of causing cancer. Many Britons are unaware of this risk, with 12% needing to declutter old cosmetics. The breakdown of active ingredients can pose skin irritations or worse. Rai advises storing products properly and using them before their expiration. While serious health risks require prolonged exposure, it's a wake-up call to tidy your beauty stash and think twice before applying that old lipstick.