The team took cells, known as dermal papilla, from the base of hair follicles on the human scalp and then exposed them to the polluted air.
In the US, wrinkle-reducer Botox and dermal filler Juvéderm are being marketed to 20-somethings over its core clientele, women over 40.
For instance, they believe that dermal filler injections would alter their appearance dramatically, or make them look "plastic" or unrecognisable.