In recent years we've seen a lot of pre-shampoo treatments hit the market. Initially they focused on nourishing and strengthening the hair but recently there has been an emergence of products that focus on removing a build up of minerals, which will in turn make the hair less porous and prone to damage, In my experience, they also help to brighten the colour. I'm already a big fan of the L'Oreal Metal Detox range so when I saw that they had released a new pre-shampoo treatment, I had to buy it! It's currently reduced on Look Fantastic and my BEAUTYLYMIN code gives a further reduction.