Figure 3.
Penetration of ferulic, coumaric, caffeic, vanillic acids, and vanillin into epidermis and dermis after aqueous propolis extract application for 24 hours.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.