Is it safe to eat food preservatives like BHA and BHT every day?

What's actually in it

Processed foods use a handful of preservatives: BHA, BHT, potassium sorbate, sodium benzoate, calcium propionate, sodium nitrite, and sulfites. Each one does its job well at keeping food from spoiling. The cumulative biological effects are becoming clearer as more data comes in.

Foods heavy in preservatives tend to cluster: cereal, crackers, cured meat, baked goods, shelf-stable sauces, deli foods.

What the research says

A 2026 study in Nat Commun analyzed the NutriNet-Santé cohort for associations between preservative food additive intake and type 2 diabetes incidence. Higher preservative intake was associated with higher diabetes risk. Multiple preservatives showed individual associations, with nitrites and nitrates leading. The diabetes effect was independent of overall sugar and calorie intake.

The practical path is fewer ultra-processed foods overall. Fresh and frozen whole foods usually don't need preservatives. Bread baked fresh at a bakery keeps a few days; the long-shelf-life grocery version is the one loaded with preservatives. Home-cooked batches frozen in portions replace most preserved convenience foods. When buying packaged, shorter ingredient lists with recognizable words are a good rule of thumb.