Are you talking about the presence of caffeine in food in general? The presence of caffeine in food in general is addressed in consumption studies. It was taken into consideration when we conducted our exposure analysis. Before permitting caffeine to be added to carbonated drinks other than cola beverages, we estimated the overall exposure to caffeine from all sources, and especially from carbonated drinks. This information is derived mainly from consumption data we have collected.
On June 8th, 2010. See this statement in context.