Low-Calorie Diet, Exercise Reversed Type 2 Diabetes Without Meds

TL;DR

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In the randomized RESET for Remission trial, 54% of participants assigned to a low-calorie meal-replacement diet and structured exercise met the study’s remission definition at 24 weeks, compared with 4% receiving usual care. The result applied to adults ages 18 to 45 with relatively recent-onset type 2 diabetes; it does not establish that the program works for everyone or that remission is permanent.

A low-calorie meal-replacement diet and structured exercise put type 2 diabetes into remission for 54% of participants in a randomized trial of 96 young adults, compared with 4% receiving usual care, researchers reported. The RESET for Remission trial measured outcomes at 24 weeks and studied adults with early-onset diabetes, not people with all forms or durations of the disease.

Remission was defined as an HbA1c below 6.5% without glucose-lowering medication for at least 12 weeks. The difference between the intervention and usual-care groups was statistically significant, with an adjusted odds ratio of 21.6; the reported 95% confidence interval was wide, from 6.2 to 114.5. The trial was open-label, meaning participants and researchers knew which care group participants were assigned to.

For the first 12 weeks, the intervention prescribed 800 to 900 calories a day through meal replacements, twice-weekly supervised aerobic and resistance exercise, and one independent exercise session each week. A further 12-week maintenance phase included a nutritionally optimized diet, a taper in meal replacements and independent exercise. About 90% completed the final assessment; researchers counted participants who did not complete it as not having achieved remission.

Participants were 18 to 45 years old, with an average age of 38, and had been diagnosed within the previous six years. Their average starting HbA1c was 7.2%. Most were taking metformin at baseline, while some used SGLT2 inhibitors and a small minority used GLP-1 drugs. Researchers reported no serious adverse events. Common effects included temporary headaches, constipation, dizziness and fatigue during diet initiation; mild infections were slightly more common in the intervention group.

Remission in Younger Adults

Early-onset type 2 diabetes can mean a longer period living with the disease and exposure to its complications. The trial authors say that makes practical approaches to improving glucose control particularly relevant for younger adults. The result offers evidence that a structured program combining food changes and exercise can help some people in this group reach a defined period of remission without medication.

However, remission is not the same as a cure. The reported outcome covered a limited follow-up period, and the trial does not establish how long participants will remain in remission or whether they will need medication again. The findings also do not show that participants should stop prescribed treatment outside medical supervision.

The intervention involved frequent support and a demanding diet and exercise schedule. Its outcomes should not be assumed to apply to less intensive programs or to people who were not represented in the trial. Clinicians and patients would need to weigh the program’s demands, health needs and potential risks individually.

How the Trial Fits Prior Research

Low-energy meal-replacement diets have been studied as a non-surgical approach to diabetes remission, but the report describes fewer studies combining that approach with structured, supervised exercise. RESET tested the combined program against routine clinical care; because it had two arms, it cannot separate the diet’s effects from the added contribution of exercise.

Study co-investigator Thomas Yates of the University of Leicester compared the findings with results for tirzepatide in a separate study, SURPASS-3. He noted that the comparison was not a head-to-head trial: RESET participants lost an average of 16.5 pounds at 24 weeks, while the cited tirzepatide group lost 28.4 pounds at 52 weeks. The different studies and time periods mean those figures cannot establish which approach is more effective.

Yates also pointed to body-composition findings from whole-body MRI scans, including changes in visceral and liver fat, and improvements in measures such as grip strength and blood pressure. These are trial findings, not proof that the program prevents future complications. The researchers said further work is needed to confirm the added benefit of exercise.

“It’s already quite a lot to ask someone to adhere to a meal-replacement diet. Adding supervised exercise makes it even more challenging. Will they be able to do it?”

— Kaberi Dasgupta, MD, MSc, McGill University, speaking at the EASD annual meeting

How Durable Is Remission?

The results show remission at 24 weeks, using a definition that required HbA1c below 6.5% without medication for at least 12 weeks. The source report does not establish whether remission lasted beyond that period, how often diabetes returned, or whether participants later needed glucose-lowering medication.

Because the intervention combined diet and exercise, the trial cannot determine how much each component contributed to remission. The study was also small, with 96 participants, and its findings concern adults ages 18 to 45 diagnosed within six years. The wide confidence interval around the adjusted odds ratio reflects uncertainty in the estimated size of the group difference. Longer follow-up and further trials are needed to clarify durability, wider applicability and the independent contribution of exercise.

Longer Follow-Up and Replication

Researchers have called for further studies to confirm the added value of exercise and to examine longer-term outcomes. Follow-up research could establish whether participants maintain remission after the supervised program ends, whether medication is later restarted, and which parts of the intervention are most practical for patients.

For now, the findings are evidence from one randomized trial, not a general instruction to adopt an 800- to 900-calorie diet or change diabetes medication. Anyone considering substantial dietary or exercise changes should discuss them with a healthcare professional, particularly if they take glucose-lowering drugs or have other health conditions.

Key Questions

What did the trial mean by diabetes remission?

It defined remission as HbA1c below 6.5% without glucose-lowering medication for at least 12 weeks. That is a measured study outcome, not proof that diabetes was cured permanently.

How many participants reached remission?

At 24 weeks, 54% of the intervention group met the remission definition, compared with 4% in the usual-care group. The trial included 96 people in total.

What did the intervention involve?

It included an 800- to 900-calorie daily meal-replacement diet and regular supervised aerobic and resistance exercise for 12 weeks, followed by a 12-week maintenance phase with a nutritionally optimized diet and independent exercise.

Does this show that exercise alone caused remission?

No. Participants received diet and exercise together, and the two-arm trial did not isolate the effect of exercise. The researchers said further studies are needed to confirm its added benefit.

Should people stop diabetes medication or try the diet on their own?

No. The findings do not advise people to stop prescribed medication or follow a very-low-calorie diet without clinical guidance. Anyone considering major diet or exercise changes should speak with a healthcare professional.

Source: rss