Olaplex now offers a new version of their No. 4 shampoo, specifically for brilliant blondes. The newest Bond Maintenance Shampoo deposits just the right amount of purple to tone down the brassiness of any blonde. Whether your blonde comes naturally or from your stylist, root to tip or balayage, even if you're proudly grey - 4-P shampoo will help keep your color cool.
CW says... Olaplex recommends using this shampoo 2-3 times per week for best results.