The Davines Solu Shampoo (£17.50) is a sulphate-free formula that's extremely gentle but a works hard when it comes to clarifying oily scalps. Since the formula is so gently, it won't leave your hair feeling dry or stripped.
The scent isn't to everyone's taste, but if it means you can go a few extra days without a hair wash, it's got to be worth an earthy smell, right?
Plus, the brand is one of the most sustainable out there. It's a B Corp, uses only responsibility-sourced ingredients, and is housed in fully recyclable packaging. It's a big thumbs up from us.