I have been experimenting with various "natural" polymers (HEC, Xanthan, Alginate, Konjac, HLA, etc) to create a serum / gel product. As you know, some result in much greater viscosity than others when hydrated, and some have greater film-forming, or surface tension properties. My question is this: Does the lower viscosity polymer allow for greater skin penetration? I have experimented with some mushroom polymers that have high viscosity, but the superficial film is barely noticeable.
So what properties in the polymer do I take into account when considering the delivery of actives?
Thanks for any help!