Myth or fact

Does prediabetes always turn into diabetes?

Short answerNo

By GyroscopeUpdated November 14, 20268 sources

No. Each year about 5 to 10% of people with prediabetes move on to diabetes, and about the same share go back to normal. In the biggest prevention trial’s follow-up, people whose blood sugar returned to normal even once had 56% lower diabetes risk later. It’s a stage you can leave in either direction.

Why do people think prediabetes always becomes diabetes?

The name does a lot of damage. “Pre” sounds like a waiting room, as if diabetes is the next stop and the only question is when. Some people hear it that way and give up before they start. Others hear the opposite, that it’s just a borderline number, and ignore it for years.

There are a lot of people in that waiting room. 115.2 million American adults have prediabetes, more than 2 in 5, and 8 in 10 of them don’t know.

How often does prediabetes turn into diabetes?

A 2012 review in The Lancet pulled together studies that followed people with prediabetes over time. About 5 to 10% moved on to diabetes each year, and about the same share went back to normal blood sugar. The rest stayed where they were. Programs that changed people’s lifestyle cut the relative risk of moving on by 40 to 70%.

Think of it as a fork in a road that you reach again every year. Each year some people step off toward diabetes and some step back toward normal, and what you do that year decides which way you lean.

Does going back to normal last?

The best answer comes from the Diabetes Prevention Program, which kept following its people for years after the trial ended. In 2012, researchers looked at 1,990 of them. People whose blood sugar had returned to normal at least once during the trial had 56% lower risk of diabetes in the years after, whichever group they’d been in, lifestyle, metformin or placebo.

That’s a strong result for a single moment of normal blood sugar. The people who got back to normal may have differed in other ways, so it can’t prove the cause, but it points the same way as everything else in the trial.

The case that it usually does turn into diabetes

Both are true, and they fit together. Prediabetes with extra weight, high numbers on more than one test and no changes is a fast road to diabetes. Prediabetes with weight loss and walking often isn’t. The next year of changes decides a lot of it.

What decides which way you go?

In the trial, weight did more than anything else. Each kilogram lost (2.2 pounds) went with 16% lower risk. Activity counted too. People who missed the weight goal but met the 150-minute walking goal had 44% lower risk.

Your numbers matter as well. A fasting glucose of 120 or an A1c of 6.3% is closer to the line than 101 or 5.7%, and the ADA’s 2026 standards ask everyone in the prediabetes range to test every year so a drift shows up early.

Timing counts too. In the Whitehall II study, insulin sensitivity had been falling for 5 years before diagnosis, and fasting sugar shot up only in the last 3. A prediabetes result usually means you’re somewhere in that window, with time to turn it.

What should you do with a prediabetes result?

Repeat it with the other test if you only had one (an A1c if you had a fasting glucose, or the reverse). Start the plan: 5 to 7% weight loss if you carry extra, 150 minutes of walking a week with 10 after each meal, carbs last, enough sleep. Retest at 12 weeks. Then test every year, and keep the walks going after the number comes down, since the gap between the trial’s groups narrowed over the years.