Conclusions
Results of this study showed that w/o/w emulsion containing 5% NAC and 5% vit.E gave
the best results in respect of stability and moisturizing effect. It has been known that vit. E
could be used as an effective moisturizer and for this reason vit. E was incorporated in the
formulations of our study for comparison when assesing the moisturizing effect of NAC.
Since there was no significant difference in case of moisturization between our
formulations containing NAC (F2*) or vit. E. (F3*). It was assumed that NAC could be used
as a moisturizer with a similar effect like vit. E. Hydrated stratum corneum provides a
flexible, intact barrier, making it highly protective, this effect is desired and it has been
shown for the first time in our study that it could be gained by using NAC [28, 29].
Therefore it could be concluded that progress was achieved in trial to introduce a new
active ingredient for cosmetic industry.