
The artificial sweetener called aspartame has been declared a "probable carcinogen" by the World Health Organization, but remains safe to consume only at certain levels.
The decisions are the result of trials conducted by WHO experts. Aspartame is one of the most popular sweeteners in the world, used in products from carbonated drinks to chewing gum or even cough syrups and fruit yogurts.
At a press conference ahead of the announcement, the WHO's head of nutrition, Francesco Branca, tried to help consumers make sense of the seemingly contradictory statements, especially those seeking artificial sweeteners to avoid sugar.
"So, as a result of this guidance, the recommendation that the WHO made is that people should moderate their consumption of sugars and sweeteners. So if consumers are faced with the decision of whether to take sweetened sodas I think a third option should be considered, which is to drink water instead and limit consumption of fully sweetened products."
On the other hand, a group of other scientists have stated that the evidence that aspartame causes cancer was weak. Despite being so widespread, its safety has been a source of controversy since it was introduced in the 1980s.
The expert panel said it made its decision based on three human studies in the United States and Europe showing a link between hepatocellular carcinoma, a form of liver cancer, and candy consumption.