Nervous consumers who are addicted to the taste of coffee but desperate to cut down on their caffeine will welcome the development on offer from a team of US chemists: a molecule, extracted from llamas, that can easily detect caffeine in a hot or cold drink.
The molecule should be easily utilized, say the team, so that the reaction with caffeine triggers a simple colour-change on a dipstick. Then drinkers could check that their friendly barista really has given them the decaf they ordered.
Although described as the world's most popular psychoactive drug for its alertness-boosting powers, many people dislike caffeine's side effects, which can include insomnia, paranoia and high blood pressure.
Link is here:Llamas help to spot fake decaf.