Figure 9.
Retention of caffeine UDV formulations, and the respective solutions controls in SC and ED and skin permeation after 24 hours, expressed as mean (µg/cm2 or %/cm2) ± standard deviation (n=3 per formulation).
Notes: Statistical analysis: one-way analysis of variance with all pairwise multiple comparison procedures (Holm–Sidak method) between each group (UDV versus respective controls and transfersomes versus ethosomes versus transethosomes); means with different letters are significantly different (P<0.05).
Abbreviations: E caf, caffeine-loaded ethosomes; ED, epidermis plus dermis; SC, stratum corneum; T caf NaCo, caffeine-loaded sodium cholate transfersomes; TE caf NaCo, caffeine-loaded sodium cholate transethosomes; UDV, ultradeformable vesicles.