Biotech-powered haircare brand K18 has revealed its latest launch with the TripleBright Oxidation Defense Purple Shampoo to help blonde hair look like new.  

Unlike other purple shampoos that temporarily mask brassiness, the TripleBright shampoo is formulated to help address the root causes. 

The formula provides an ionic detox, helping to remove up to 3 months of brass-causing hard water and mineral buildup with just 1 wash. This helps to restore tone and improve light reflection.  

TripleBright also features Precision Violet Technology to help neutralise yellow tones while minimising staining.  

The shampoo also contains a lightweight polymer which helps to protect the hair from future metal and mineral buildup, helping to preserve brightness between salon visits.  

Ensuring controlled application, the formula is delivered via a lightweight foam for even distribution from root to tip.  

Suveen Sahib, co-founder and CEO of K18, says: “For decades, the industry has treated brassiness as a surface-level colour issue, when in reality oxidation is a chemistry problem that distorts over time. 

“Whether hair is lightened in the salon or at home, oxidative stress and mineral buildup compromise clarity.  

“TripleBright was engineered to correct that distortion at its source by removing buildup, neutralising with calibrated precision and helping to defend against future tone shifts,” comments Sahib.  

TripleBright Oxidation Defense Purple Shampoo will be available at SpaceNK, Cult Beauty and Sephora from 27th April 2026, RRP £39.