On October 18,
1969, the U.S. Department of Health, Education
and Welfare banned future production of food
products containing cyclamates (used in some
artificial sweeteners), which had been shown to
cause cancer in rats.
Some parts of
the food industry responded to the ban by
reintroducing sugar into some of their products.
Pepsi was one of the companies that played up the
added flavor of using sugar in its Diet Pepsi
line while downplaying the extra calories.
Meanwhile, Pepsi and other manufacturers worked
on new, safer sweeteners.