The American food watchdog agency, Centre for Science
in the Public Interest (CSPI), has repeatedly expressed concerns about
the carcinogenic effects of this sweetener. The last tests carried out
on this product by it manufacturer were proven to be totally inadequate
so as to determine the long-term effects on humans. The US governments
National Toxicology Program has nominated acesulfame K (potassium) for
‘chronic toxicity’ testing (1996).