Ayds were slimming toffee cubes around in the 70s and early-80s. They were also hugely expensive! They came in chocolate, chocolate mint, caramel and butterscotch flavours. The toffee was supposed to help satisfy your cravings for something sweet long enough to keep you from raiding the fridge and eating higher-calorie items. It was all down to the active ingredient benzocaine, which later changed to phenylpropanolamine, presumably to reduce the sense of taste to reduce eating. not only did the ingredient change, but the slogan on the packaging was originally: 'Ayds Reducing Plan vitamin and mineral Candy' but this changed to the catchier 'appetite suppressant candy'.
Unfortunately for the company's marketing department, AIDS was starting to become a name known to the public and, well, that meant the end of Ayds. Even a name change to Aydslim didn't help.