Barbecue sausages are also carcinogenic. What matters is how much and in what doses. Hey WHO: Show me scientific, peer revieved, reproduced in independed labs papers with solid proofs. Not preliminary results of "one research". Than I will weigh pros and cons and decide if I should use it. Strangely decades of use under FDA and other reputable institurions had no remarks like WHO. Don't forget that also dihydrate monoxide is also promote cancer, and we all drink it like water.