A growing number of US teenagers are using caffeine pouches to get an energy rush, say experts who worry the trend could soon take off in the UK.
The small teabag-like pouches, placed between the lip and gum, deliver a quick caffeine hit, straight to the bloodstream.
Some social media influencers are pushing products, recommending them to gym-goers for performance or to students who want to be alert for exams.
TikTok Shop sells lots of brands and flavours that could appeal to young people, says Dr Rob van Dam from George Washington University.
But with a single pouch containing as much caffeine as two cups of regular coffee, it could be easy to take too much and get bad side effects, he says.
