Over the course of 25 years, Sensa creator Dr. Alan Hirsch has conducted ongoing research on the effects of smell and taste on eating habits, ultimately leading him to spearhead one of the largest studies ever conducted on weight loss.

Over a 6 month period, 1,436 women and men sprinkled scented, flavorless "Tastant" crystals on everything they ate. Every slice of pizza and every slice of apple. Every bowl of cereal and every bowl of ice cream. Participants were not required to add to their normal diet or exercise program, however they were asked to maintain their existing exercise routines and eating habits.

A control group of 100 participants did not use Tastants.

Researchers weighed participants at the beginning of the study, then again at the end of the study. The results are illustrated on the following chart. The 1,436 people in the treatment group who completed the program lost an average of 30.5 pounds — nearly 15% of their total body weight. Participants achieved these results without having to follow any special exercise regime or diet.

Those in the control group lost only 2 pounds, on average.