Popular sweeteners may leave effects in mice lasting for generations

Some of the changes were observed in offspring who did not receive the sweeteners themselves.

Sucralose left a longer-lasting imprint—up to the second generation. This is not proof of harm to humans and not a verdict on zero-calorie products. So far, it’s only mice and subtle shifts, without diabetes.

There was no diabetes. These are subtle signals, not a finished disease. The study was conducted in mice; causality in humans has not been proven. It’s too early to translate “grandkids will suffer from soda” to people.

But the logic is unpleasant—and useful. Even “natural” stevia is not neutral for the microbiome. And if part of the effect runs through bacteria and gene regulation, the question is no longer only about the calories in today’s can.

Sources:

1. Frontiers. "Popular sweeteners may leave effects that last for generations." ScienceDaily (31 August 2026).
2. Concha Celume F. et al. "Artificial and natural non-nutritive sweeteners drive divergent gut and genetic responses across generations." Frontiers in Nutrition (2026). DOI: 10.3389/fnut.2026.1694149.