Olaplex No.4 Bond Maintenance Shampoo is a true hair savior, according to Whitnee's video review. After subjecting her hair to multiple bleaching sessions, it was in desperate need of some TLC. Thankfully, this shampoo, along with the No.5 Conditioner, came to the rescue. Whitnee noticed a remarkable improvement in the health and shine of her hair. Despite needing a haircut, her locks felt healthier and were easier to brush. Additionally, she mentioned that the DP Hue Deep Conditioner helped her maintain her hair color. Overall, Whitnee's review highlights the effectiveness of the No.4 Bond Maintenance Shampoo in restoring and maintaining hair health.