Caffeine is, according to New Scientist, the planet's most popular "psychoactive drug." In the United States alone, more than 90% of adults are estimated to use it every day.
But now even the US - home of Coca-Cola, Starbucks and the 5-Hour Energy shot - is questioning the wisdom of adding it to everyday foodstuffs like waffles, sunflower seeds, trail mix and jelly beans.
In a statement, the Food and Drug Administration (FDA) highlighted the "unfortunate example" of Wrigley chewing gum producing packs of eight sticks which each contained as much caffeine as half a cup of coffee. Subsequently, Wrigley said it would "pause" production of the product.
The agency is also looking at highly-caffeinated energy drinks, and said it was concerned about the "cumulative impact" of adding stimulants to products.
According to the US Substance Abuse and Mental Health Services Administration, the number of people seeking emergency treatment after ingesting energy drinks doubled to more than 20,000 in 2011.
Jon Kelly of BBC News Magazine has the post that'll go perfect with that cup of coffee: Link