It has been known for centuries that Japanese women have been washing their hair with rice water – yes, actual water they boiled their rice in – to stimulate growth and keep it strong and conditioned.

Many bloggers and hair stylists have made the DIY treatment, hailed the 'hair water' trend – but if you're lazy (like us) then a new brand has just made a version of it called Rice Water Hair Milk.

The all-natural skin and hair care brand Ash & Nectar, (which is sold on Etsy) came up with the formula which includes real rice water, rosemary for penetrating hair strands, lavender for conditioning and argan oil for treating split-ends.

Confused by how it works though? No worries, we'll lay it out for you.

First, wash and shampoo your hair as normal, then massage the rice water into your scalp and work your way down to the roots until it's fully covered.

Sit back and relax for 5 minutes to let the milk do its magic, and then rinse it out. Simple!