Enter the Revolution Haircare Plex shampoo and conditioner. At £10 a pop, I bought them having heard friends rave about the bond-repairing technology. Hair is made up of a protein called keratin.

All the dupes coming to stores nationwide from July 19: Plex No.1 Shampoo for £2.49 - Olaplex Maintenance Shampoo dupe, worth £28 Plex No.4 Bonding Oil for £2.49 - Olaplex Bonding Oil dupe ...