Gunter Kuhnle
Professor of Nutrition and Food Science, University of Reading
The publication of the IARC and JECFA opinion is very welcome as it ends the speculation about the safety of Aspartame. The two WHO agencies have done what they are supposed to do: IARC has reviewed the data and found some very limited evidence that Aspartame could cause cancer – and based on the same data JECFA has concluded that a consumption up to 40 mg per kg of body weight per day is safe and there is no need to change current recommendations.
“It is unfortunate that leaking some information might have created unnecessary uncertainty and concern as consumers might be rightfully worried if they are told that something that is in many foods could cause cancer. The published opinion puts this into perspective and makes it very clear that there is no cause for concern when consumed at the current amounts. Scientific advisory bodies are often unable to react quickly and respond to an emerging story so it’s good they will now have both the IARC and JECFA assessments to digest and respond to.
“This illustrates also the importance of distinguishing between hazard and risk and highlights the difficulty in communicating hazards: sunlight is a hazard as it can cause cancer, but the risk depends on the amount of sun light and whether we use protection. Likewise, even if Aspartame causes cancer at very high amounts, there is no risk when consuming it at the amounts that are permitted in foods.