Leonor Greyl Paris L'Huile de Leonor Greyl (£34)
"Pre-shampoo treatments are a new thing for me. I never used to do them, and now, I can't get enough and I've noticed a huge difference in my hair. The Leonor Greyl Paris L'Huile de Leonor Greyl is formulated to deeply hydrate and smooth dry hair with jojoba, coconut, sesame, and sunflower seed oil. You simply leave it on for 10 minutes before rinsing it out in the shower and it gives you ultra-shiny, glass-like hair." — JH