Bullfrog Secret Potion N.1 All in One Beard Oil is a beard and moustaches oil for all skin types. The irreplaceable secret formula by Bullfrog barbers, ideal for achieving flawless shaves and nourishing the longest beards. Secret Potion All in One Beard Oil multifunctional oil that can be used both as a pre-shave treatment and as a finish to make long and very frizzy beards softer.