Diet Coke drinkers are going the way of the dinosaur and BlackBerry users, according to Coca-Cola’s earnings report out Wednesday.
The Atlanta, Georgia-based company said the Diet Coke brand declined 7% over the last three months. That continues a trend of negative Diet Coke growth the company’s been seeing for a decade, TIME reported in February:
But soda drinkers aren’t giving up on the sweet stuff entirely. Coke’s low-calorie Coca-Cola Zero brand is up 6%, almost entirely making up for Diet Coke’s plunge.
It’s hard to tell exactly what’s driving the Diet Coke to Coke Zero shift. Some diet sodas have suffered from speculation over the health consequences of artificial sweeteners like aspartame, causing PepsiCo to remove that ingredient from Diet Pepsi. But aspartame is found in Coke Zero as well as Diet Coke. It could be simply a matter of taste: While Diet Coke has a distinguishable flavor, Coke Zero is intended to taste exactly like regular Coke.