All Sugar-Free/Diet Products used to be sweetened with Saccharine and/or Cyclamate. But, after the Rat-Cancer Scare, both were banned. Saccharine was allowed back on the market with a Warning Label: "USE OF THIS PRODUCT MAY BE HAZARDOUS TO YOUR HEALTH. THIS PRODUCT CONTAINS SACCHARIN WHICH HAS BEEN DETERMINED TO CAUSE CANCER IN LABORATORY ANIMALS." To this day, Cyclamate is still banned in the US.

Because of this new label, most companies [in the US at least] switched to the newly approved Sweetener ASPARTAME. A handfull of manufacturers [mostly Gum/Candy Makers] continued to used Saccharine with Sugar Alcohols, but all of the Soda makers switched over to Aspartame. A few years back, the law requiring the warning labels on Saccharine was repealed.

Coca-Cola reformulated TAB. It is now sweetened with a combination of Saccharine and Aspartame. Interestingly enough, most fountain Diet Colas are sweetened with a combination of Saccharine and Aspartame. This is probably the reason, I can tolerate Diet Coke from a fountain better than I can from a 20 oz. Bottle. Diet RC is sweetened with SPLENDA (Sucralose.) Diet Rite, Clover Valley Diet Cola, and a number of others are sweetened with a combination of SPLENDA (Sucralose) and SUNNET (Acesulfame Potassium.) Pepsi has some drinks (Pepsi ONE if I remember correctly) sweetened with Aspartame and SUNNET (Acesulfame Potassium.) They also make a Diet Slurpee for 7-11 with Tagatose (a Sugar that is only partially absorbed and has very little effect on Blood Sugar/Insulin,) Erythritol (a Sugar Alcohol,) and SPLENDA (Sucralose.)

I was digging in the back yard of the house I grew up in a few weeks ago [I was planting Vegetables] and I found some stuff buried under the dirt from the 70s. It had probably become buried after Hurricane David flooded the area in 1979. One of them was an old TAB Bottle Cap, which listed the ingredients. Saccharine was the only sweetener listed. I wish they'd go back to using Saccharine or switch to SPLENDA and/or SUNNET.