If you’ve put your hair through a lot - you know, like your liver in December - then the NAK Hair Structure Complex Protein Shampoo might have your name on it. This strengthening shampoo has been designed to help damaged, fragile hair rebuild. It’s one for those of us who heat style with wild abandon, and change hair colour every other month. It’s also vegan, and made without parabens and sulfates. You can expect stronger, silkier hair with each wash.