- Penetration enhancer, encapsuling or suspending key ingredients in so-called nanospheres or nanoemulsions, increase teir penetration into the skin:
L'OREAL (which ranks in number 6 in nanotechnology patentholder in U.S.) has used polymer nanocapsules to deliver active ingrdients. eg. retinol or Vitamin A, into the deeper layers of the skin. in 1998 the company unveiled Plentitude Revitalif, an anti-wrinklecream using nanoparticles.