Cream and sugar may not be the only additives in your morning cup of coffee. Tough growing conditions and rising demand are leading some coffee producers to mix in wheat, soybean, brown sugar, rye, barley, acai seeds, corn, twigs and even dirt.
The filler ingredients are natural and don’t pose any immediate health risks for most people. But these additives could be a serious problem for people with soy or wheat allergies, said Suzana Lucy Nixdorf, a researcher at Universidade Estadual de Londrina in Brazil.
That’s why Nixdorf developed a chemical test that can spot the difference between a batch of pure coffee grounds and a batch with unwanted ingredients.