Sensa

Hirsch’s idea was based on "sensory-specific satiety." He believed that the brain receives signals from the nose and tongue to tell the body it’s full. By enhancing the smell and taste of food using "tastants"—highly concentrated aromatic crystals—he claimed he could trick the brain into feeling satisfied much faster.

In 2014, the stepped in. They charged Sensa with making "unfounded weight-loss claims" and using misleading clinical studies. The FTC pointed out that the "tastants" were essentially maltodextrin (a food additive), silica, and various flavorings—hardly a pharmacological breakthrough. Hirsch’s idea was based on "sensory-specific satiety

Sensa was marketed as a "sprinkle-on" diet. There were no pills, no calorie counting, and no banned foods. Users simply carried two shakers—one for savory foods (like pizza or meat) and one for sweet foods (like fruit or ice cream)—and "seasoned" everything they ate. The Meteoric Rise There were no pills, no calorie counting, and