Understanding diabetes: Reducing the risk of type 2

© Tridsanu Thopet

Dr Stacey Lockyer, Senior Nutrition Scientist at the British Nutrition Foundation, walks us through understanding diabetes & reducing the risk of type 2 diabetes

In the UK, more than 4.9 million people have diabetes, and this figure is on the rise. It is estimated that 850,000 people are also currently living with type 2 diabetes
but are yet to be diagnosed.

What is diabetes?

Diabetes is a complicated, serious and often lifelong condition in which blood glucose levels can become too high. Type 1 diabetes (previously known as insulin-dependent diabetes) is an auto-immune condition in which the immune system causes permanent damage to particular cells in the pancreas that produce insulin, and so insulin production stops. Type 1 diabetes is managed using insulin injections coupled with a healthy diet.

Type 2 diabetes (previously known as non-insulin dependent diabetes) occurs when the body does not produce enough insulin or the insulin produced does not work properly (this is known as insulin resistance). Diet modification and physical activity are the two main approaches to treating type 2 diabetes, and medications are often needed for its management. Around 90% of those with diabetes have type 2 diabetes, around 8% have type 1 diabetes, and about 2% of people with diabetes have rarer types of diabetes. Diabetes costs the UK’s National Health Service around £10 billion annually, about 10% of its entire budget. Almost 80% of this is spent on treating complications which include problems with the eyes, feet, heart, kidneys, nerves and gums, as well as acute events related to the blood sugar being too high or too low (i.e. ‘hypers’, ‘hypos’, hyperosmolar hyperglycaemic state and diabetic ketoacidosis).

© Boarding1now

Who is at risk?

An estimated 13.6 million people in the UK are at increased risk of type 2 diabetes. Type 2 diabetes is typically associated with being overweight or obese and can be prevented. Some of the other risk factors that can increase the likelihood of developing type 2 diabetes (some of which are modifiable and others which are not), are:

  • Being over 40 years of age (or over 25 years of age for those from Black African, South Asian or African- Caribbean backgrounds). Those from Black African, African-Caribbean or South Asian (Indian, Pakistani, Bangladeshi) backgrounds living in the UK, are two to four times more likely to have type 2 diabetes than the white population.
  • Having type 2 diabetes in the family.
  • Having a waist measurement of >80cm for women, >94 cm for men and >90 cm for men from a South Asian background.
  • Those who have been told they have impaired glucose tolerance (sometimes known as ‘prediabetes’) or metabolic syndrome by a healthcare professional are at increased risk.
  • Having a history of high blood pressure.
  • Having a history of polycystic ovary syndrome or gestational diabetes.
  • Those with particular mental health conditions (schizophrenia, bipolar disorder, depression) and those taking antipsychotic medication are at increased risk.
  • Deprivation – people from deprived areas are more likely to have diabetes.
  • Having disturbed sleep or getting too little or too much sleep.
  • Several lifestyle factors are linked to overweight and obesity, including smoking, being sedentary, eating an unhealthy diet and drinking too much alcohol.

Diabetes UK offer an online Know Your Risk tool which provides information about your risk of type 2 diabetes. The tool identifies eligible individuals for the Healthier You NHS Diabetes Prevention Programme in England and can improve people’s understanding of diabetes.

How can I reduce the risk of developing type 2 diabetes?

Eating a healthy, balanced, and varied diet, being physically active, and achieving and maintaining a healthy body weight can help to reduce the risk of developing type 2 diabetes and can even put the condition into remission for some people.

A healthy, balanced, and varied diet includes plenty of fruits and vegetables, meals based on higher fibre varieties of starchy foods, some protein from a variety of sources, some reduced fat dairy foods or fortified alternatives, and small amounts of unsaturated oils and spreads. Foods that are higher in fat, sugar or salt should be limited.

For more evidence-based information about how you can reduce your risk of type 2 diabetes through diet and lifestyle, and have a better understanding of diabetes, visit the British Nutrition Foundation website


  1. Diabetes UK (2022) Diabetes Statistics https://www.diabetes.org.uk/
  2. NHS (2019) Diabetes https://www.nhs.uk/conditions/diabetes/
  3. Public Health England (2014) Adult obesity and type 2 diabetes https://assets.publishing.service.gov.uk/government/uploads/system/upload s/attachment_data/file/338934/Adult_obesity_and_type_2_diabetes_.pdf

Contributor Profile

Senior Nutrition Scientist
British Nutrition Foundation
Phone: +44 (0)20 7557 7930
Website: Visit Website


Please enter your comment!
Please enter your name here