Tirzepatide "Prevents Diabetes." Prevented, Delayed, or Masked?

The argument always arrives the same way. Two options in the cart, a real price gap between them, and somebody in the chat drops the line that ends the discussion: tirzepatide prevents diabetes, semaglutide just makes you lose weight.

I've heard that sentence enough times to recite the rest of the thread from memory. And I should say up front what I have riding on it: I run a research-peptide company, incretin attention is the single biggest driver of questions we get, and we sell nothing containing tirzepatide. Not a vial, not a variant, nothing. So I have no cart to protect here, just a stake in whether this market can read its own evidence.

The word doing all the work in that sentence is "prevents." Almost nobody forwarding the screenshot can tell you what it was counting.

Prevented, delayed, or masked

I run every prevention claim through three questions, in this order, and I have never once needed a fourth.

One: what event was counted, a disease or a threshold? Type 2 diabetes, as a trial endpoint, is a line on a lab report. Cross the glucose or HbA1c cutoff, you're a case. Stay under it, you're not. That's how it has to be operationalized, and there's nothing dishonest about it. But it means a drug that lowers blood glucose is being scored on whether it lowered blood glucose. Fewer people crossing the line is a real, clinically meaningful thing. It is not the same act as removing the disease from the body.

Two: who got pre-selected into the population? Prevention trials in this space enroll people with prediabetes and elevated BMI, because that's where enough events happen fast enough to measure anything. Which means the result belongs to those people. It does not travel to someone with normal glucose tolerance, and it does not travel to a lean 26-year-old in a Discord asking whether he should run it prophylactically. That extrapolation happens constantly and it is not supported by anything.

Three: what happened after the drug stopped? This is the question that decides which of the three words you're allowed to use. Prevented means the risk is gone. Delayed means the clock restarted. Masked means the number moved while the drug was in the system and the underlying state didn't. If you cannot say what happened off drug, you cannot say "prevent" without an asterisk, and the asterisk is the whole story.

Why I'm not repeating the number