French Studies Link Nitrites to 47% Higher Diabetes Risk and Higher Cancer Odds
Updated
Updated · BBC Science Focus · May 11
French Studies Link Nitrites to 47% Higher Diabetes Risk and Higher Cancer Odds
2 articles · Updated · BBC Science Focus · May 11
Two large French studies tied higher intake of nitrates, nitrites and related preservatives to increased cancer and type 2 diabetes risk, adding fresh evidence against common additives in processed meats.
The diabetes analysis found people with the highest preservative intake faced a 47% higher risk of type 2 diabetes than those with the lowest intake.
The cancer study linked sodium nitrite to prostate cancer and potassium nitrate to breast cancer, with absolute risk by age 60 rising to 4.2% from 3.4% and to 5.9% from 4.8%, respectively.
The findings came from France's NutriNet-Sante cohort of more than 100,000 adults, which researchers say can quantify real-world exposure to a wide range of food additives.
The report places nitrites alongside other ultra-processed food additives under scrutiny, as more than half of average diets in the UK and US are made up of ultra-processed foods.
Beyond individual 'bad' ingredients, what is the hidden danger when common food additives are mixed together in our daily diet?
As US states begin banning food additives, will a patchwork of rules force a national change in how our food is made?
New 2026 Evidence: Food Preservatives Significantly Increase Type 2 Diabetes and Cancer Risk in Large French Study
Overview
In early 2026, French researchers made a major breakthrough by linking common food preservatives to higher risks of several cancers and type 2 diabetes. This finding is based on large-scale data from the NutriNet-Santé study, which allowed Inserm’s team to closely examine how long-term exposure to preservatives affects health. While earlier experiments had suggested that some preservatives might harm cells or DNA, direct evidence in large human populations was lacking until now. These new studies mark a crucial step in understanding the long-term health impacts of widely used food additives, highlighting the need for ongoing research and public health attention.