Summary of the Studies on Preservatives, Cancer & Type 2 Diabetes
Two recently published studies in Nature Communications and BMJ suggest a potential link between preservative consumption and increased risk of both cancer and type 2 diabetes. The studies analyzed data from over 100,000 french adults (NutriNet-Santé study) collected between 2009 and 2023. While further research is needed, the findings call for a reevaluation of regulations regarding preservative use in ultra-processed foods.
Cancer Study (BMJ):
* no strong link was found between preservatives in general and cancer.
* Higher consumers of certain preservatives showed increased cancer risk. Specifically:
* Potassium sorbate: 14% increased overall cancer risk, 26% increased breast cancer risk.
* Sulphites: 12% increased overall cancer risk.
* sodium nitrite: 32% increased prostate cancer risk.
* Potassium nitrate: 13% increased overall cancer risk, 22% increased breast cancer risk.
* Acetic totals: 15% increased overall cancer risk, 25% increased breast cancer risk.
* Acetic acid: 12% increased overall cancer risk.
* Researchers hypothesize these compounds may alter immune and inflammatory pathways, potentially promoting tumor advancement.
* The study is observational and cannot prove causation, but its findings align with existing experimental data.
Type 2 Diabetes Study (Nature Communications):
* Higher consumption of overall preservatives, non-antioxidant preservatives, and antioxidant additives was associated with a significantly increased risk of type 2 diabetes (47%, 49%, and 40% respectively).
* Increased consumption of 12 out of the 17 studied preservatives was individually linked to a higher risk of developing type 2 diabetes.
* This is the first study to investigate the link between preservative additives and type 2 diabetes incidence.
Overall Recommendations:
The researchers recommend that health agencies reevaluate the safety of these food additives, considering the balance between benefits and risks. They also urge manufacturers to limit unnecessary preservative use and encourage consumers to prioritize fresh,minimally processed foods.