Prep Your Hair With a Nourishing Oil Kerastase L'Huile Elixir (£27.50) If you're struggling with frizzy or damaged hair, apply a few drops of this nourishing oil to clean, damp hair. It contains argan, marula, and camellia oil to seal split ends and smooth dry, fragile locks. Image Source: kerastase.co.uk Kerastase L'Huile Elixir £27.50 from kerastase.co.uk Buy Now