Introduction: Among the topical systems to deliver cosmetic actives, the gel form is very desired, because it offers non-oily sensory and also allows the application of the formulation associated with techniques for skin rejuvenation, such as phonophoresis.
Purpose of the paper: to develop and evaluate the rheological parameters of a hydrophilic cosmetic gel.
Methods: The rheological analysis consisted of steady-state flow measurements with shear rates ranging from 5 to 1000 s−1, an amplitude sweep test conducted at an angular frequency of 10 rad s−1 to obtain the linear viscoelastic region, and the frequency sweep performed in the range 0.1–100 rad s−1. The three-interval thixotropy test (3ITT) was also performed.
Results: The sample was found to have a stable rheological state over the 16 weeks. She also exhibited “solid-like” (gel) behavior. Furthermore, it was characterized as a strong gel and shear-thinning pseudoplastic non-Newtonian fluid, with no thixotropy. The developed formulation presented physical stability, and therefore we suggest the formula be used in cosmetic formulations.
Discussion and conclusion: The vehicle used can impact the stability and effectiveness of cosmetic products. The rheological study of cosmetic vehicles can predict the physical stability of formulations and help formulators in the development of more stable and consumer-friendly formulas.