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Diabetes and Endocrinology

Why South Asians Face Type 2 Diabetes Risk From a Younger Age: A UK GP Explains the Risk, the Science, and What to Do Now

Dr Kennedy Umege10 min read

NHS.uk says people from a South Asian, Chinese, Black African or Black Caribbean ethnic background may be more at risk of Type 2 Diabetes from age 25, compared with age 40 for White people. NICE already says something practical: encourage a diabetes risk assessment from age 25 in high-risk ethnic groups. The NHS Health Check most people know about starts at 40. That 15 is 40 minus 25. It is a programme-age gap, not a diagnosis-age.

Higher risk is not a personal failing. NICE and NHS.uk both start thinking about risk at a younger age for people from these backgrounds.

I am Dr Kennedy Umege, a UK GP (GMC 7592446; GP Register from 31 January 2023). Registered qualification: MB BS 2004, University of Port Harcourt. UK-registered since August 2018. This article breaks down the NICE pathway, the NHS check gap, and the practical questions you can take to your own GP. It is general health education. It is not personal medical advice. It does not represent the NHS or any NHS employer.

A companion video is in production for The Educating GP YouTube channel. This article is the live, written version. Do not wait for a video to speak to your own GP.

Who Is Most at Risk and Why It Matters Now

If you are of Indian, Pakistani, Bangladeshi, or Sri Lankan heritage living in the UK, your chance of Type 2 Diabetes is higher than for the general population.

This is not a distant risk. NHS.uk lists a higher chance of Type 2 Diabetes from age 25 for people from South Asian, Chinese, Black African or Black Caribbean backgrounds.

The NHS Health Check in England does not begin until age 40. NICE PH38 already says people in high-risk ethnic groups should be encouraged to have a diabetes risk assessment from 25. That 15 is 40 minus 25. It is the gap between the NICE risk-assessment age and the national invitation most people know about. It is not the same as “everyone gets diabetes 15 years earlier.” In that gap, blood sugar can still rise with no one routinely looking — unless you or your GP start a risk assessment.

Why NICE Uses a Lower BMI Threshold

For most adults, the NHS treats a BMI of 25 as the start of the overweight range. For South Asian adults, NICE uses a lower action point when deciding whether to consider a diabetes blood test.

At a BMI of just over 23, NICE PH38 says a venous blood test should be considered for South Asian or Chinese adults aged 25 or over. That is two BMI points lower than the usual overweight line. A World Health Organization Expert Consultation published in The Lancet (2004) found that a substantial proportion of Asian people are at high risk of Type 2 Diabetes at a BMI below 25, and identified 23 as a possible public health action point. NICE PH38 uses a BMI over 23 as the point to consider a blood test for South Asian and Chinese adults. It is a risk-assessment threshold, not a diagnosis.

The WHO Expert Consultation found that Asian populations have a different relationship between BMI, body fat percentage and health risk than European populations. In practice, risk can be higher at the same BMI.

NHS.uk explains that prediabetes means your blood sugar is higher than normal but not high enough for diabetes, and that it puts you at higher risk of getting diabetes in the future.

This is why NICE says a blood test should be considered for a South Asian adult aged 25 or over whose BMI is over 23, even though that BMI is in the usual healthy range.

The NHS Check Gap: Risk Assessment From 25, Invitation From 40

I need to be precise, because this is where articles over-shoot. NICE guideline NG28 is about managing Type 2 Diabetes once it is diagnosed. Last updated 18 February 2026. It is not a screening guideline. The NICE guideline that covers finding people at high risk is PH38. Correct title: Type 2 diabetes: prevention in people at high risk. Last updated 15 September 2017. Still current. Not withdrawn.

PH38 does not say every South Asian adult aged 25 or over must have a diabetes blood test, regardless of BMI. It says three practical things. Encourage a diabetes risk assessment from 25 in high-risk ethnic groups. Offer a blood test if the risk score is high. Consider a blood test if you are South Asian or Chinese, aged 25 or over, and your BMI is over 23. That guidance exists. What most families actually meet is the NHS Health Check, which starts at 40.

NHS England Digital’s National Diabetes Audit 2024–25 (published 12 February 2026) counted 284,010 people with type 1 diabetes and 3,713,155 with type 2 and other diabetes in England (1 April 2024–31 March 2025). Do not treat the England NDA counts as a UK total.

Consider this scenario. A South Asian patient walks in. They are 35. Their BMI is 23.5. A GP who only uses the standard BMI-25 line may see no red flag. NICE PH38 says a blood test should be considered at that BMI. They can leave without an HbA1c if no one applies the ethnicity-specific threshold.

That is not a lazy GP. It is a system not applying the lower threshold NICE sets for that patient. The scenario is teaching, not an audit finding.

The Cultural Silence Around Diabetes in South Asian Families

Before the biology, there is something else that needs to be said carefully and honestly.

In many British South Asian households, health is managed in a very particular way. When someone is unwell, it is often handled quietly. Within the family. With food first. With prayer. With the working assumption that if you are not in hospital, you are probably fine.

Diabetes carries a particular kind of weight in the South Asian community. There is shame attached to it. The unspoken belief that diabetes means you have been eating badly. That it means you were not careful enough. That it is a personal failure wearing a medical name.

In general practice it is not unusual to meet people who have known for months that their blood sugar is rising and have not told anyone. (This is a general observation, not a description of any individual patient.)

Because they did not want to worry the family. Because they were afraid of what it would mean at the next Eid gathering, the next wedding, the next visit from the in-laws. Because in the community, a diagnosis can feel like a public label.

Type 2 Diabetes in the South Asian community is not a character failure. It is not a lifestyle failure. NHS.uk lists ethnic background, family history, weight and physical activity among the things that affect risk. None of them is a personal failing. The shame belongs to the gap in the system. Not to you.

The Rule: When a Diabetes Risk Assessment Should Start

If you are South Asian and aged 25 or over, ask for a diabetes risk assessment now. Not only at 40.

That is not a blanket order for a blood test, and it is not “regardless of what your BMI says.” NICE PH38 supports a risk assessment from 25. A venous blood test — HbA1c or fasting glucose — should be offered if the risk score is high, and considered if your BMI is over 23. NHS.uk also flags higher Type 2 Diabetes risk from age 25 in South Asian, Chinese, Black African and Black Caribbean groups.

If you are pregnant, this article is not your pathway. Talk to your maternity team.

Three Practical Steps to Take at Your Next GP Appointment

Here is how to use this information with your own GP. It is a prompt, not a demand, and not a personal prescription.

1. Ask your GP for a diabetes risk assessment — and whether an HbA1c is appropriate

The HbA1c measures your average blood sugar over the past two to three months. No fasting required. If you and your GP agree a blood test is appropriate, these are the numbers in UK guidance:

  • Below 42 mmol/mol — not in the high-risk blood band. Risk can still rise later.
  • 42 to 47 mmol/mol — high risk, according to NICE PH38. NHS.uk calls blood sugar that is higher than normal but not high enough for diabetes "prediabetes". This is a window where change still matters.
  • 48 mmol/mol or above — possible Type 2 Diabetes. If you have no symptoms, NICE PH38 says the test should be repeated before it is written down as a diagnosis. Do not diagnose yourself from a screenshot.

You can say this to your GP: “I am South Asian, I am 25 or over, and NHS.uk says my Type 2 Diabetes risk is higher from this age. NICE PH38 says people like me should be encouraged to have a diabetes risk assessment. Can we do that, please?” If your BMI is over 23, add: “NICE says a blood test should be considered. Can we discuss an HbA1c?” You can also complete the Diabetes UK Know Your Risk tool, which NHS.uk links to, and take the result in. Stay polite. This is a prompt, not a demand.

2. Ask About the NHS Diabetes Prevention Programme

The NHS Diabetes Prevention Programme — Healthier You — is free and evidence-based. It runs for about nine months, as a group or digitally. If your HbA1c comes back in the high-risk range (42 to 47 mmol/mol), this programme is designed to help prevent progression to Type 2 Diabetes. Ask your GP about a referral by name. Your GP will check eligibility. I cannot refer you from an article. Some local providers offer culturally tailored content — ask locally. That is not a national guarantee.

If you are also experiencing stress, anxiety, or low mood related to your diagnosis or health concerns, NHS Talking Therapies offers free, confidential support. Mental health and physical health are not separate.

3. Share Your Family History

NHS.uk says you may be more at risk if a parent, brother or sister has Type 2 Diabetes. Put that on the table at your next appointment. Ask your GP to record your ethnicity, your family history, and your BMI, and ask: “Given that, is an HbA1c appropriate now?”

Move This Knowledge Through Your Family

In South Asian families, health decisions are rarely individual. If a man in his forties gets a borderline result, his wife is managing his meals. His mother is managing the narrative. His children are watching what he does next.

That family system can be the most powerful health tool in existence, or the most significant barrier. The difference is almost always one person. Someone who understood the stakes and made it impossible to ignore.

That person could be you, reading this article right now.

A conversation in a family WhatsApp group might be the most clinically useful thing that happens in that family this year. Share this article. Share the HbA1c numbers. A companion video is in production; share that only once it is live.

Silence in a South Asian family does not mean safety. And normal for your community does not mean normal for your blood sugar.

When to Seek Urgent Help

If you have already been told your HbA1c is raised, speak to your GP and ask what the plan is. Do not leave with a letter and no follow-up.

If you have symptoms such as increased thirst, passing urine more frequently than usual, unexplained fatigue, or blurred vision, please speak to your GP. Do not assume these will pass on their own.

NHS.uk says call 999 or go to A&E if you think you have high blood sugar and you are feeling or being sick or have stomach pain, are breathing more quickly than usual or your heart is beating faster, feel drowsy or are struggling to stay awake, have breath that smells fruity, or feel confused. Do not drive yourself.

Key References

This content is for general health education only. It does not replace individual medical advice. Always consult your own doctor for personal health decisions. This is independent educational commentary. It does not represent the NHS or any NHS employer.

Dr Kennedy Umege, UK GP (GMC 7592446; GP Register from 31 January 2023). MB BS 2004, University of Port Harcourt. UK-registered since August 2018.

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