For people who struggle on conventional diets, scientists say they have developed aroma-enhancing crystals that, when sprinkled on food, can make you feel full after only a few mouthfuls.
Tests in the US were so successful that obese participants, who were offered a range of simulated flavors, including cheese, horse radish and coffee, lost an average of 28 pounds.
Now the Smell and Taste Treatment and Research Foundation in Chicago, which developed the crystals, called Sensa granules, is recruiting 1,000 volunteers for a five-year study.