Guild Wars 2

Hey all

Is there any food/potion etc that helps increase the end exp you get when coming dungeons??

There is a +5% experience guildbanner. The effect last 30 minutes, so should be enough to complete some explorable mode dungeon paths.
If using a private solo-guild and buy the influence it cost 1 gold (500 inluence) to unlock it and 10 silver (50 influence) to spawn one banner.

I dont believe there is any boost or food that increases this.