Ask the doctor: I'm prediabetic – how can I prevent type 2 diabetes?

Dr Alasdair Scott discusses how to avoid diabetes

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GB NEWS

Anna Barry

By Anna Barry


Published: 31/10/2025

- 15:21

Up to 50 per cent of people can prevent or delay the onset of type 2 diabetes

A diagnosis revealing blood glucose measurements between 42 and 47 mmol/mol represents prediabetes, a condition where sugar levels exceed normal ranges yet remain below the threshold for type 2 diabetes.

This intermediate state serves as a critical alert system, offering individuals valuable time to implement preventive measures.


Emma Pike, deputy head of clinical at Diabetes UK, explained that the HbA1c blood test provides a three-month average of glucose levels, with readings of 48 mmol/mol or higher indicating diabetes.

"Prediabetes is used quite commonly used by healthcare professionals to describe the state of having higher than normal blood glucose levels, but they're not high enough for you to be diagnosed with type 2 diabetes," said Ms Pike.

Thankfully, research indicates that up to 50 per cent of those diagnosed with prediabetes can successfully avoid developing type 2 diabetes by modifying their daily habits.

Rather than viewing a diagnosis of prediabetes as a foregone conclusion, medical professionals frame it as a chance to take control of one's health trajectory.

"It's not an inevitability," the expert assured those anxious about their prediabetes diagnosis becoming a type 2 diagnosis.

Medical professionals examine several lifestyle factors following the detection of prediabetes, beginning with body weight considerations through respectful discussions about potential dietary modifications and increased movement.

Man doing kettlebell exercises

Aim for 150 minutes of moderate-intensity exercise weekly, plus two strength training sessions

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"Healthcare professionals will look at whether somebody may need support with weight management," said Pike, noting the importance of an active lifestyle and nutritious diet.

The UK's chief medical officers recommend 150 minutes of moderate activity weekly, supplemented by strength exercises twice per week.

Nutritional guidance emphasises consuming more fruits, vegetables, wholegrains, and lean proteins to establish sustainable eating patterns.

"People will prediabetes are encouraged to have as healthy a diet as possible, as often as possible," the expert explained.

Healthy plate featuring avocado, prawns, and salad

Cultivate a healthy diet, prioritising fruits, vegetables, wholegrains, and lean proteins

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Sleep quality represents another significant consideration, with both insufficient and excessive rest linked to an increased diabetes risk.

"Having a good amount of sleep, not having too much sleep or too little sleep, has been associated with an increased risk of type 2 diabetes," Ms Pike stated.

Tobacco use similarly elevates risk levels, making smoking cessation services valuable for those diagnosed.

Beyond lifestyle modifications, annual health reviews monitor glucose levels alongside blood pressure and cholesterol, ensuring comprehensive oversight of patients' progress.

Various support systems exist to assist individuals in making necessary adjustments, ensuring patients do not face this challenge alone.

The NHS Diabetes Prevention Programme offers structured support, while Diabetes UK provides online resources including meal plans and risk assessment tools.