Kérastase is a French luxury hair care brand, founded in 1964, that provides professional, science-backed haircare products and in-salon treatments for all hair types and concerns, including shampoos, conditioners, serums, and oils. The brand focuses on a “care-first” philosophy, using high-performing ingredients to address issues like damage, dryness, and frizz, and is known for its luxury experience and iconic products such as the elixir ultima oil.