What is the life expectancy of someone with diabetes? There is no single number that can answer that question for an individual. Population studies generally find a shorter average lifespan in groups with diabetes than in otherwise similar groups without it, but the difference varies substantially by diabetes type, age at diagnosis, complications, time period, location, and access to care.
Key takeaways
- Life expectancy is a statistical average for a population, not a personal countdown or prediction.
- Earlier diagnosis, diabetes type, kidney and cardiovascular health, smoking, blood pressure, lipids, and access to effective care can all change the picture.
- Reported gaps have narrowed over time in some countries, while progress has not been equal across populations.
- Clinicians focus on current, modifiable risks and recommended screening rather than promising a certain number of added years.
What Is the Life Expectancy of Someone With Diabetes? The Quick Answer
Research cannot assign one reliable lifespan to a person with diabetes. Cohort averages combine people with different ages, health histories, complications, treatments, and social circumstances. A clinician can discuss the factors most relevant to you, but even a detailed assessment cannot predict an exact age or date.
Life expectancy estimates the average remaining years for people of a certain age within a defined population, based on death rates observed during a study period. It is not the same as the average age at death, and it does not tell any one participant how long they will live.
The CDC's National Diabetes Statistics Report 2024 describes diabetes prevalence, complications, and mortality across the United States. It also shows why one number is inadequate: outcomes and access to care differ across communities. Type 1, type 2, and gestational diabetes are not interchangeable, and studies that pool groups may hide important differences.
| What studies can tell you | What studies cannot tell you |
|---|---|
| Average outcomes within a defined group and time period | The exact lifespan of one person |
| How outcomes differ by age at diagnosis, diabetes type, or complication status | Whether diabetes alone caused an individual's death |
| Whether outcomes changed across calendar periods in a country or health system | Whether older results reflect today's care everywhere |
| Associations between factors such as smoking or kidney disease and mortality | A guaranteed result from changing one factor |
| Areas where prevention, screening, and access need improvement | An individualized treatment target or medication choice |
When reading a headline, look for the country, enrollment years, participant age, diabetes definition, follow-up period, and comparison group. A study of adults diagnosed decades ago may not represent a recently diagnosed adult receiving current care. Conversely, better averages in a well-resourced health system may not represent someone facing medication costs, food insecurity, discrimination, transportation barriers, or limited specialist access.
Does Type 2 Diabetes Shorten Life Expectancy?
On average, many studies answer yes, but that is a group-level association rather than a personal verdict. Type 2 diabetes is associated with higher rates of cardiovascular disease, kidney disease, some infections, and other complications that can affect mortality. Learn more about how diabetes may affect the body, while remembering that having diabetes does not mean every complication will occur.
Age at diagnosis is especially important. A 2023 analysis by the Emerging Risk Factors Collaboration in The Lancet Diabetes & Endocrinology, covering high-income-country cohorts, found that diagnosis at a younger age was associated with a larger reduction in average life expectancy than diagnosis later in life. The authors reported progressively greater differences with each decade of earlier diagnosis. That finding describes accumulated population risk over more years; it does not set a deadline for a young adult.
The comparison group matters too. No observational study can perfectly account for income, neighborhood, care access, smoking, other diseases, or treatment changes. Results also differ when researchers measure all-cause death, cardiovascular death, or years without complications.
The phrase "shortens life" can sound fixed. More accurately, type 2 diabetes changes the probability of several outcomes across a population. A person's future remains uncertain.
How Does Type 2 Diabetes Affect Life Expectancy?
Type 2 diabetes may influence life expectancy through several overlapping pathways rather than one single mechanism. Over time, elevated glucose can be associated with blood-vessel and nerve injury. Blood pressure, cholesterol, smoking, kidney function, sleep, medicines, activity, genetics, and other conditions can compound or reduce risk. Cardiovascular and kidney conditions are especially important, which is why clinicians assess them alongside glucose.
The diabetes and kidney health guide explains why urine and blood tests are part of routine care. Kidney changes may be silent at first. Test results need clinical interpretation because dehydration, medicines, infections, aging, and other conditions can also affect them.
Outcomes have improved over recent decades in some higher-income countries. CDC surveillance documents declines in several major diabetes complications and diabetes-related mortality over parts of the modern surveillance period, although trends differ by outcome and population. Advances in blood-pressure and lipid management, smoking reduction, earlier detection, kidney-protective and cardiovascular therapies, diabetes technology, and coordinated complication screening likely contribute.
That improvement should not be overstated. Progress has not reached every community equally, and periods of stalled or worsening trends have occurred. The ADA Standards of Care in Diabetes—2026 emphasizes person-centered care and assessment of social determinants because affordability, insurance, stable housing, food access, health literacy, and the ability to attend appointments can influence whether recommended care is realistically available.
Does Diabetes Reduce Life Expectancy?
Across populations, both type 1 and type 2 diabetes have been associated with lower average life expectancy, but "does diabetes reduce life expectancy?" still has no universal numeric answer. The size of an observed gap changes with age, diabetes duration and type, calendar era, geography, complications, and the reference population.
Relative risk, absolute risk, and life expectancy answer different questions. Life expectancy uses population mortality patterns to estimate remaining years. Mixing these measures can make a headline sound more certain than the underlying study. Online calculators likewise omit important context and should be conversation prompts, not clocks.
Which Factors Does the Care Team Assess?
Clinicians generally work on factors linked with near- and long-term health rather than trying to promise added years. Targets and visit schedules are individualized according to age, diabetes type and duration, pregnancy, medicines, other conditions, risks of low glucose, personal priorities, and the current ADA Standards of Care.
| Area assessed | What it helps the team understand | Typical clinician owner |
|---|---|---|
| A1C and glucose patterns | Average glucose exposure, daily variation, and whether the current plan needs review | Primary care clinician or endocrinologist; diabetes care and education specialist supports interpretation |
| Blood pressure | Cardiovascular and kidney risk in context, including home readings when appropriate | Primary care clinician, endocrinologist, cardiologist, or nephrologist |
| Lipids | Cholesterol and triglyceride patterns used in cardiovascular risk assessment | Primary care clinician, endocrinologist, or cardiologist |
| Kidney blood and urine tests | Filtration and markers of kidney injury, interpreted with medicines and other conditions | Primary care clinician or endocrinologist; nephrologist for concerning findings |
| Dilated eye examination | Retinal changes and other eye disease | Optometrist or ophthalmologist |
| Foot and nerve examination | Skin, circulation, sensation, structure, and injury risk | Diabetes clinician; podiatrist or vascular clinician when indicated |
| Smoking or vaping | Exposure, readiness for support, and appropriate cessation options | Primary care clinician; pharmacist or cessation specialist may support |
| Sleep | Duration, quality, possible sleep apnea, shift-work effects, and barriers | Primary care clinician; sleep-medicine clinician when indicated |
| Activity and function | Current ability, limitations, preferences, and an appropriate movement plan | Primary care clinician; physical therapist or exercise professional as referred |
| Mental health | Diabetes distress, anxiety, depression, eating concerns, and available support | Primary care clinician or behavioral health professional |
The A1C-to-blood-sugar chart can explain why A1C and meter readings are related but not identical. It should not be used to set a target. Conditions affecting red blood cells, kidney function, pregnancy, medicines, and glucose variability may change interpretation.
A Practical Framework for Focusing on Modifiable Factors
This framework is for organizing a care conversation, not self-prescribing treatment:
- Know the current picture. Ask what your recent glucose, blood pressure, lipid, kidney, eye, and foot findings mean together.
- Identify the highest-priority issue. Let the appropriate clinician explain which risk deserves attention first and why.
- Choose a feasible next step. Discuss affordability, culture, mobility, schedule, food access, sleep, caregiving, and mental health so the plan fits real life.
- Clarify ownership. Ask who orders follow-up testing, who manages each medicine, and when specialists should communicate.
- Set a review point. Confirm when results will be revisited and which symptoms should prompt earlier contact.
Sleep and activity are not stand-alone promises about longevity. The guide to how sleep affects blood sugar can help you prepare questions. Have activity individualized when health conditions or mobility limitations are present.
Do not start, stop, or change a prescription, nonprescription product, herb, or supplement based on a lifespan statistic. The prescriber and pharmacist should review benefits, risks, interactions, cost, and alternatives for the individual.
How Can You Talk With a Clinician About Prognosis?
"Prognosis" does not have to mean asking for an exact number. It can mean understanding the most important risks now, which information is missing, and what the care team plans to monitor.
Before the visit, use the diabetes appointment preparation checklist and write down:
- what prompted the question and any study or calculator you saw;
- when diabetes was diagnosed and whether the type has been confirmed;
- recent laboratory and home-monitoring records available to you;
- cardiovascular, kidney, eye, foot, nerve, and low-glucose history;
- every medicine, nonprescription product, vitamin, herb, and supplement;
- smoking or vaping, sleep, activity, stress, and mental-health concerns; and
- barriers involving cost, transportation, food, housing, work, caregiving, or insurance.
Useful questions include: "Which factors matter most in my situation?" "Is this study relevant to someone my age and with my health history?" "What are my individualized targets?" "Which screening is due?" "Who is responsible for follow-up?" and "What would make you refer me to a cardiologist, nephrologist, eye clinician, podiatrist, diabetes educator, or behavioral health professional?"
When the Numbers Feel Frightening
Mortality statistics can trigger fear, grief, anger, guilt, or a sense that the future has already been decided. Those reactions are understandable. Diabetes is not a personal failure, and a population average is not a judgment about effort or worth.
Pause repeated searching if it increases distress, and bring the source to a clinician. If worry disrupts daily functioning, tell the diabetes clinician and ask for mental-health support. The article on diabetes and anxiety offers language for starting that conversation.
If distress includes thoughts of self-harm or suicide, call emergency services or contact a local crisis service immediately. In the United States, call or text 988 for the Suicide & Crisis Lifeline. A life-expectancy article should never replace immediate human support.
Frequently Asked Questions
What is the life expectancy of someone with diabetes?
There is no single life expectancy for someone with diabetes. Studies estimate averages for defined populations, while an individual's outlook varies with diabetes type, age at diagnosis, cardiovascular and kidney health, complications, smoking, treatment, social circumstances, and access to care. A clinician can discuss relevant risks but cannot predict an exact lifespan.
Does type 2 diabetes always shorten a person's life?
Population studies often find shorter average life expectancy among groups with type 2 diabetes, but they do not show that every person's life will be shortened. Outcomes vary widely, and a cohort average is not a deadline. Current health, age at diagnosis, complications, treatment, and access to care all shape risk.
Why does age at diabetes diagnosis matter?
A younger diagnosis can mean more years of exposure to diabetes-related risks, and cohort research associates earlier type 2 diabetes diagnosis with a larger average life-expectancy difference. That relationship is population-level and cannot predict one young person's future. Diabetes type, health history, care, and social conditions also matter.
Has the diabetes life-expectancy gap improved over time?
The gap has narrowed during some periods and in some countries as deaths and major complications declined, but improvement has been uneven. Earlier detection, cardiovascular and kidney risk management, smoking reduction, newer therapies, and screening may contribute. Older findings may not represent current care, while current progress is not shared equally.
Can lowering A1C tell me how many years I will gain?
No. A1C is one useful measure within a broader assessment, and no specific change can promise a certain number of added years. The clinical meaning depends on glucose patterns, low-glucose risk, medicines, age, pregnancy, other conditions, and individualized goals set with the care team.
What should I ask my clinician about my outlook?
Ask which current factors most affect your cardiovascular, kidney, eye, foot, and overall health; what your individualized targets are; which screening is due; and who owns each follow-up. Share barriers such as cost, sleep, stress, food access, mobility, or medication concerns so the plan can reflect your circumstances.
References
- Centers for Disease Control and Prevention. National Diabetes Statistics Report. Accessed September 2026.
- American Diabetes Association Professional Practice Committee. Standards of Care in Diabetes—2026. Diabetes Care. 2026.
- National Institute of Diabetes and Digestive and Kidney Diseases. "Diabetes Overview" and "Preventing Diabetes Problems." National Institutes of Health. Accessed September 2026.
- Emerging Risk Factors Collaboration. "Life expectancy associated with different ages at diagnosis of type 2 diabetes in high-income countries: 23 million person-years of observation." The Lancet Diabetes & Endocrinology. 2023.
- Rawshani A, et al. "Risk Factors, Mortality, and Cardiovascular Outcomes in Patients with Type 2 Diabetes." New England Journal of Medicine. 2018.
Next Steps
Bring the study or statistic that concerns you to your next appointment, gather recent test results and a complete product list, and ask which cardiovascular, kidney, glucose, eye, foot, sleep, smoking, and mental-health factors deserve priority. Keep medicine and target decisions with the appropriate clinician and pharmacist.
For adults with type 2 diabetes or prediabetes seeking optional education alongside medical care, the Done With Diabetes™ program, a holistic approach to type 2 diabetes, organizes lifestyle education about food, movement, sleep, and stress alongside medical care. It does not predict lifespan, calculate personal prognosis, prevent death, diagnose complications, set targets, select or change medicines, or replace a clinician, pharmacist, specialist, behavioral health professional, or emergency care.