How much lower is the diabetes risk if prediabetes reverts to normal blood sugar?
If you have prediabetes, your blood sugar is higher than normal but not yet in the diabetes range. The good news: many people can bring their blood sugar back to normal through lifestyle changes. A large analysis of 18 studies found that those who successfully reverted to normal blood sugar had a 68% lower risk of developing diabetes compared to those whose prediabetes persisted 3. This is a significant reduction, but it's important to understand what the research shows and how to achieve reversion.
What the research says
A 2024 systematic review and meta-analysis pooled data from 18 studies (12 included in the main analysis) with over 535,000 participants. It found that people whose prediabetes reverted to normal blood sugar had a 68% lower risk of future diabetes (hazard ratio 0.32) compared to those with persistent prediabetes 3. This means the risk was reduced by about two-thirds. The same analysis found no significant difference in risk of heart disease, stroke, or death between those who reverted and those who did not 3.
Achieving reversion is possible but not easy. A 3-year lifestyle intervention trial (the PREVIEW trial) found that only 12% of participants maintained normal blood sugar for the full 3 years 2. Those who succeeded lost more weight and had greater improvements in metabolic markers compared to those who did not 2. The study highlights that sustained remission requires ongoing effort.
Other research shows that lifestyle changes are the cornerstone of managing prediabetes. For example, a trial of semaglutide (a medication) improved physical quality of life in people with prediabetes and schizophrenia, but the effect was partly due to weight loss 1. However, simpler approaches like SMS text messaging programs have not shown significant benefits for weight or blood sugar in prediabetes 4. This suggests that more intensive, personalized interventions may be needed.
Timing of meals may also matter. One study found that a later start to eating (first meal of the day) was linked to worse blood sugar and insulin levels in people with prediabetes 8. This suggests that when you eat could influence your chances of reversion.
What to ask your doctor
- What is my current HbA1c or fasting blood sugar level, and what would be a normal target?
- Based on my health profile, what lifestyle changes (diet, exercise, weight loss) are most likely to help me reverse prediabetes?
- How often should I have my blood sugar checked to see if I am reverting to normal?
- Are there any medications, like metformin or semaglutide, that might be appropriate for me to help lower my diabetes risk?
- Could meal timing, such as eating earlier in the day, be a useful strategy for me?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.