The best purple shampoos, according to our testers, include Amika, Kristen Ess, and IGK, and Nexxus. Our picks range in price ...

Color Safe Shampoo: Low pH shampoo for color-treated hair helps prolong color vibrancy. Gently cleanses to prevent unnecessary stripping of color. Suitable for color-treated or natural hair.

Added black oat extract ... As a powerful double whammy for optimising grey hair, Silvina Everyday Grey Hair Shine Shampoo is hard to beat. Packed with natural ingredients that help strengthen ...

Before using a purple shampoo, wash your hair with a clarifying shampoo. This will help remove any existing product buildup, which could prevent the purple shampoo from properly absorbing.