“Artificial sweeteners are not poison. The cancer signals come from animal studies using massive doses and from observational data too messy to draw clean conclusions from. The weight-gain narrative dissolves when you run proper randomized trials. The glucose and microbiome concerns are theoretically interesting but not well-supported by the best available evidence.

In nutrition, the right question is almost never “Is this one thing good or bad?” It’s: compared to what, at what dose, for whom, and at what tradeoff?

Compared to a sugary soda: diet drinks appear to be a reasonable swap for many people. Compared to water: probably a step down, but that doesn’t make them harmful. Compared to a permission slip for a daily Twinkie: that’s where the bargain might go wrong.”