Your hair will feel completely rejuvenated thanks to the L’Oréal Elvive Total Repair 5 Shampoo ($7). This multi-faceted shampoo strengthens hair, leaves it feeling silky smooth, and restores it ...

The citric acid in this shampoo is also used in stop baths when developing photographs. Every month Wired's chemist Dr Ling Ge deconstructs an everyday product. She works at Imperial College ...