Surprisingly, decaf actually does contain some caffeine. The decaffeination process removes around 97%, leaving around 2mg in the average cup of decaf.
A thirst-quenching 100 million cuppas are consumed each day in Britain, making black tea among the most consumed drinks in the world.
The percentage of cocoa solids in your chocolate determines its caffeine levels. As a guide, a 3.5oz (100g) serving of milk chocolate has around 21mg while the equivalent amount of dark chocolate (70-85% solids) has 80mg.
Some flavoured waters contain 60-125mg of caffeine per bottle (254ml/8.5 fl oz), particularly those marketed as caffeinated waters designed to give an energy boost.
Green tea contains powerful antioxidant EGCG and nutritionists believe it could boost brain function and protect against disease.
Many ice creams contain zero caffeine, being essentially frozen custard, but it all depends on the flavour. Chocolate or coffee varieties will almost certainly contain some caffeine unless the flavourings are entirely artificial.
A large Americano (around 473ml/16fl oz) contains around 225mg caffeine while the same size energy drink can have up to 357mg, which is edging very close to the 400mg recommended daily safe limit.
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