Birchbox is relaunching its clean category with a greatly expanded definition, a clearer badge for clean products and a new limited-edition kit. While the brand’s previous definition was “free of petrochemicals, sulfates, phthalates, parabens”, the new definition is much more detailed: In order for a product to be designated “clean” at Birchbox, the formula (including its fragrance, if applicable), must not contain any of the following ingredients: parabens, phthalates, sodium lauryl...