Weight and fat are not the same. The only thing the scale can do is measure your total body weight. That includes everything: fat, muscle, bone, organs, blood, water, gut contents and muscle glycogen.

Coca-Cola Co.’s first diet cola was a pop-culture icon in the 1970s and early ’80s, then faded after the launch of Diet Coke. Even after Tab’s market share dwindled to almost nothing, the ...