An anonymous reader writes "Researchers at Washington University School of Medicine in St. Louis are developing a quick test for caffeine that works even with hot beverages and plan to adapt their technology to a simple ('dipstick') test that can be used to check for caffeine in a variety of drinks. The key to the caffeine test comes from llamas and camels since these camelids happen to be among the few creatures whose immune systems can produce antibodies that aren't destroyed at the high temperatures common to brewed beverages. The researchers reasoned that if they could create heat-resistant camelid antibodies that reacted to caffeine, they could potentially build a durable assay suitable for use almost anywhere."
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