Release of Propolis Phenolic Acids from Semisolid Formulations and Their Penetration into the Human Skin <i>In Vitro</i>

<table>Penetration of coumaric, vanillic acids, and vanillin into epidermis and dermis after propolis aqueous extract containing hydrogel application for 24 hours.</table>

Evidence-Based Complementary and Alternative Medicine

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Figure 4

Figure 4: Release of Propolis Phenolic Acids from Semisolid Formulations and Their Penetration into the Human Skin <i>In Vitro</i> 

Evidence-Based Complementary and Alternative Medicine

Release of Propolis Phenolic Acids from Semisolid Formulations and Their Penetration into the Human Skin In Vitro

Figure 4