Weight Loss and Type 2 Diabetes: Can You Put Diabetes Into Remission?

What is type 2 diabetes remission?

Type 2 diabetes remission is defined as achieving a HbA1c below 48 mmol/mol (6.5%) for at least three months without the use of glucose-lowering medications. It is not a cure — the underlying susceptibility to diabetes remains — but it means that blood glucose levels have returned to a non-diabetic range without medication, with all the associated reductions in risk of complications.

Until relatively recently, remission was considered rare and achievable only through bariatric surgery. The evidence now clearly shows that substantial weight loss through non-surgical means can also achieve remission in a significant proportion of people.

The DiRECT trial: landmark evidence for remission through weight loss

The Diabetes Remission Clinical Trial (DiRECT), conducted in UK primary care and published in The Lancet in 2018, is the most important study in this area. Key findings:

• Participants following a structured low-calorie diet (approximately 850 kcal/day for 12 to 20 weeks) achieved an average weight loss of 10 kg at one year
• 46% of participants in the intervention group achieved remission at one year, compared with 4% in the control group
• 86% of those who lost 15 kg or more achieved remission
• At two years, 36% of the intervention group remained in remission
• Remission was strongly correlated with the degree of weight loss — the more weight lost, the greater the likelihood of remission

How does weight loss cause remission?

The mechanism is now well understood. Excess fat accumulation in the liver and pancreas impairs both insulin sensitivity and insulin secretion. Research by Professor Roy Taylor at Newcastle University, using MRI to measure organ fat, demonstrated that substantial weight loss removes fat from the liver and pancreas, restoring normal insulin secretion and sensitivity — effectively reversing the pathophysiology of type 2 diabetes in those who have not had the condition for too long.

This twin cycle model suggests that remission is most achievable in people who have had type 2 diabetes for fewer than six years and who have not yet experienced significant loss of beta cell function.

What about GLP-1 receptor agonists and tirzepatide?

The weight loss achieved with GLP-1 receptor agonists and dual GLP-1/GIP agonists is now substantial enough to produce remission in a meaningful proportion of people with type 2 diabetes. The SURMOUNT-2 trial of tirzepatide in adults with type 2 diabetes and obesity showed that 32% of participants achieved HbA1c below 48 mmol/mol without glucose-lowering medication at 72 weeks — meeting the definition of remission — at the highest dose.

What does this mean for people with type 2 diabetes?

For people with type 2 diabetes who are overweight or obese, weight loss is not just beneficial — it may be the most powerful intervention available. Even if full remission is not achieved, significant weight loss reduces HbA1c, reduces or eliminates the need for diabetes medication, and substantially reduces the risk of diabetes complications including retinopathy, nephropathy, neuropathy, and cardiovascular disease.

Book a consultation with Weight Loss Wales to discuss how medical weight loss treatment can help manage your diabetes.