In 2023, Carly Fraser from Live Love Fruit reviewed research on harmful chemicals in shampoos, focusing on sodium lauryl sulfate (SLS), parabens, phthalates, formaldehyde, and synthetic fragrances. These are linked to skin irritation, hormone disruption, and environmental damage, with studies showing SLS causes skin sensitivity in 40% of users, and parabens mimic estrogen, raising breast cancer risk by 10-20% in some lab tests.