Intensive low-calorie diet with exercise shows promise for type 2 diabetes remission in younger adults

For years, the dominant message to people with type 2 diabetes has been to cut carbohydrates. Now, a low-fat, plant-based diet built around porridge, pasta, fruit and vegetables is being presented in some reports as another credible route to remission, drawing on the work of Dr. Neal Barnard and patient experiences, according to some accounts.

The approach eliminates animal products entirely but places no limit on whole-food carbohydrates from fiber-rich sources. Some adherents have reported losing significant weight and achieving remission within months, according to media reports.

The plant-based angle arrives alongside a separate clinical trial, published October 1 in The Lancet Regional Health – Americas, that tested a very different but equally intensive method: slashing calories to 800–900 a day while adding structured exercise. That study enrolled 96 adults aged 18 to 45 — a group researchers specifically targeted because early-onset type 2 diabetes tends to progress faster and carry higher risks than the same disease diagnosed later in life.

After six months, 54% of participants in the diet-and-exercise intervention achieved diabetes remission, compared with just 4% of those receiving usual medical care, according to CNN. Remission was defined as a hemoglobin A1c level below 6.5% — the diagnostic threshold for diabetes — without glucose-lowering medication for at least three months.

Early-onset type 2 diabetes refers to diabetes diagnosed by age 45. It tends to progress more rapidly than diabetes diagnosed later in life, with faster progression and a higher risk of complications. Someone diagnosed at age 30 could live with diabetes for decades.— Dr. Leana Wen, emergency physician and clinical associate professor, George Washington University

The trial, conducted at three specialized centres in Canada and the United Kingdom, involved a highly structured protocol. For the first two weeks, participants consumed only meal replacements. From week three, they added one regular meal daily while staying within the calorie target, and began attending two supervised exercise sessions a week combining aerobic activity with resistance training, plus a third independent aerobic session. The final 12 weeks focused on gradually returning to regular food while maintaining weight loss, with ongoing support from dietitians, exercise specialists and physicians who adjusted medications throughout.

The intervention group lost approximately 16.5 pounds (7.5 kilograms) more than those receiving usual care, and also showed improved cardiorespiratory fitness, including lower resting heart rates and better exercise capacity, according to CNN.

Researchers specifically included strength training because muscle tissue plays a central role in blood sugar regulation — after eating, insulin moves glucose from the bloodstream into muscle cells for energy or storage. In type 2 diabetes, that process is impaired, and rapid weight loss without resistance training can reduce muscle mass, potentially worsening the problem.

The results sit alongside existing evidence from other approaches. The DiRECT trial, a high-profile earlier study, used a similar 800–900 calorie 'soups and shakes' protocol and reported around 46% remission at one year through roughly 15 kilograms of weight loss, according to summaries of the research landscape. Ketogenic programmes such as those run by Virta Health have also shown high short-term remission rates in other trials. The overall evidence base remains mixed, with individual results varying considerably across all approaches.

I would start with a conversation with your clinician about whether remission is a realistic goal and what approach would be safe. In particular, the low-calorie diet used in this study should not be attempted without very close medical supervision.— Dr. Leana Wen, emergency physician and clinical associate professor, George Washington University

The caution is pointed. People taking insulin or oral medications called sulfonylureas can develop dangerously low blood sugar when they sharply reduce food intake, and clinicians may need to adjust prescriptions before any major dietary change, according to CNN. Only 40% of participants in the Lancet trial met all the study's criteria for adherence — a sign of how demanding the programme was even with full institutional support.

For those who cannot or do not want to pursue an intensive programme, Dr. Wen noted that less restrictive changes — reducing sugary drinks and refined carbohydrates, prioritising vegetables, fibre and protein, and working toward 150 minutes of moderate aerobic exercise weekly plus twice-weekly resistance training — can still slow diabetes progression and reduce the risk of complications, even without achieving full remission.

What the accumulating research makes clear is that remission from type 2 diabetes is achievable through more than one dietary route, but no approach is a simple self-help project. Whether the method is a whole-food plant-based diet, a very-low-calorie meal replacement plan, or a ketogenic programme, the evidence consistently points to the need for medical supervision — and honest conversations with a clinician about which path, if any, is appropriate for an individual's circumstances.

Why it matters — With type 2 diabetes affecting tens of millions and increasingly striking younger adults who face decades of potential complications, evidence that remission is achievable — through more than one dietary route — changes what patients and clinicians can realistically aim for.

Sources differ on Best dietary approach for type 2 diabetes remission: Low-fat, whole-food plant-based diet high in carbohydrates (no calorie counting, no animal products) — Dr. Neal Barnard's programme (co.uk) vs Very-low-calorie diet (800–900 kcal/day) combined with structured aerobic and resistance exercise — RESET for Remission trial (cnn.com) vs Low-carb or ketogenic approaches — referenced as also showing high short-term remission rates in other trials (co.uk)

Reported by co.uk, telegraph.co.uk, cnn.com, bhf.org.uk, nutrition-network.org, journals.bmj.com