Researchers in Germany have developed an informatics approach to determining whether a beverage or food product contains natural or synthetic caffeine. The technique could allow regulators to check how well manufacturers of added-caffeine products are adhering to the rules regarding caffeine source in their product labeling and marketing campaigns. The team found that several well-known products available on supermarket shelves and labeled "natural" actually contained quantities of synthetic caffeine. The team suggests that their approach has the potential to become a routine method for authenticity control of caffeine-containing products.
However you take it, caffeine is organic