How Long Can You Live With Diabetes: What to Know

People diagnosed with diabetes today can expect to live far longer than at any previous point in history, though the condition still shortens life expectancy by roughly six to twelve years depending on the type and when it is caught. A recent systematic review and meta-analysis estimated that men with type 1 diabetes live to about 65 on average and women to about 68, while people with type 2 diabetes lose fewer years overall but face wildly different outcomes depending on how early the disease appears and how well it is managed.¹ Those headline numbers hide enormous variation. Some people with diabetes live into their nineties; others die decades earlier than their peers. The gap between those trajectories comes down to a handful of factors that are worth understanding in detail.

How Type 1 and Type 2 Differ in Life Expectancy

Type 1 diabetes consistently carries a larger life-expectancy penalty than type 2. Across pooled studies, men with type 1 lost about 11 years of life compared to the general population, and women lost about 11 years as well. For type 2, the figures were roughly 7 years for men and 6 for women.¹ An Australian registry study found that people with type 1 diabetes had an estimated life expectancy at birth of about 69 years, which was roughly 12 years less than the general population during the study period.²

The reason for the gap between types is straightforward. Type 1 destroys the body’s ability to produce insulin entirely, which means lifelong dependence on injected or pumped insulin from a young age, decades of exposure to blood-sugar swings, and a longer window for complications to develop. Type 2 typically appears later in life and progresses more gradually, so the accumulated damage has less time to pile up. But that generalization breaks down badly when type 2 is diagnosed young, as the next section explains.

There is also real variation across countries. A multicountry study found that life expectancy at age 20 for men with type 2 diabetes ranged from about 44 years in Lithuania to roughly 59 years in Japan, a 15-year spread driven by differences in health-care systems, management intensity, and population health.³ Where you live and what care you can access matters almost as much as the diagnosis itself.

Why Age at Diagnosis Changes Everything

If there is one factor that swings the prognosis for type 2 diabetes more than any other, it is how old you are when it starts. A major study pooling data from more than 23 million person-years of observation found a striking dose-response pattern: every decade earlier that type 2 diabetes was diagnosed was associated with roughly three to four fewer years of life. Using U.S. death rates, someone diagnosed at age 30 died an average of 14 years earlier than someone without diabetes, while a diagnosis at age 50 meant about 6 years lost.⁴

The relative risks are even more dramatic. People diagnosed with type 2 before age 40 had more than three times the overall mortality risk of people without diabetes, and more than six times the risk of dying from cardiovascular disease specifically.⁵ Those relative risks dropped with each later decade of diagnosis. Someone diagnosed after 70 had a mortality risk only about 40% higher than average, a gap that matters less when overall life expectancy is already limited by age.

This finding is especially relevant right now because type 2 diabetes is increasingly being diagnosed in younger adults, teenagers, and even children. The disease process in young-onset type 2 appears to be more aggressive, with faster loss of insulin-producing capacity and earlier appearance of complications. If you are diagnosed in your thirties, the implication is not just “you have a long time to manage this” but “the disease is hitting harder and the window for damage is wider.”

What Actually Kills People With Diabetes

Heart disease is the leading cause of death for people with diabetes, and it is not close. Compared to the general population, people with diabetes have substantially higher rates of heart failure, coronary heart disease, and peripheral artery disease.⁶ A large national cohort study found that diabetes was associated with about 7 additional deaths per 1,000 person-years from all causes and about 3.5 additional deaths per 1,000 person-years from cardiovascular disease alone.⁷ Among people with diabetes, cardiovascular death rose in a stepwise fashion as average blood sugar (measured by HbA1c) climbed above 7%.⁷

Kidney disease is the other major threat. In a real-world cohort of more than 600,000 people with diabetes, about 10% died over roughly four years of follow-up. The risk of kidney failure climbed steeply as kidney function declined: once filtration rates dropped below a critical threshold, kidney failure actually became more likely than death from other causes.⁸ A separate national cohort study confirmed that people with diabetes in the highest risk category for kidney disease progression had roughly two and a half times the mortality risk of those in the lowest category.⁹

The practical takeaway is that managing blood pressure, cholesterol, and kidney function is not optional background maintenance. These are the pathways through which diabetes shortens life, and they are also the ones where treatment has the most impact.

Foot Ulcers, Fatty Liver, and Other Complications That Reshape the Odds

Certain complications deserve attention because their impact on survival is larger than most people expect. Diabetic foot ulcers are a stark example. About 80% of lower-limb amputations in people with diabetes are preceded by a foot ulcer. A JAMA review reported that the five-year mortality rate for people with a diabetic foot ulcer is around 30%, and for those who undergo a major amputation it exceeds 70%.¹⁰ In a one-year prospective study, about 15% of participants with an infected foot ulcer had died within 12 months, and roughly one in six needed an amputation.¹¹ Foot ulcers often seem like a minor problem compared to heart attacks or kidney failure, but the data says otherwise.

Fatty liver disease is another complication gaining recognition. It is extremely common among people with type 2 diabetes, and its presence is associated with higher cardiovascular and overall mortality even when the liver disease is mild.¹² A global epidemiology review found that among people with type 2 diabetes and fatty liver, all-cause mortality was roughly 17 per 1,000 person-years, with cardiac-specific mortality around 4 per 1,000 person-years.¹³ The combination of diabetes and liver inflammation creates a feedback loop that accelerates both conditions.

Blood Sugar Control and the “Legacy Effect”

How well you manage blood sugar has a compounding effect over time, and the benefits of good control appear to persist long after they are established. Modeling studies have shown that stepwise reductions in HbA1c are associated with delayed onset of complications and measurable gains in life expectancy. Even modest improvements in people who already had reasonably good control, such as moving from 7.0% to 6.5%, added a fraction of a year, while larger improvements in poorly controlled patients added about a year.¹⁴ Those fractions add up over decades of disease.

There is a catch, though. Pushing blood sugar too low carries its own dangers. Severe hypoglycemia, the kind where you need help from another person, is linked to about double the risk of coronary heart disease, roughly 70% higher all-cause mortality, and even elevated cancer mortality in people with type 2 diabetes.¹⁵ The goal is consistent, moderate control rather than aggressive lows. For most people with type 2, an HbA1c target somewhere around 7% is the sweet spot where you get the protective benefits without courting dangerous drops.

How Lifestyle Factors Shift Mortality Risk

If age at diagnosis is the single biggest predictor of how many years diabetes costs you, lifestyle is the biggest lever you can pull once you have the diagnosis. An international study combining multiple large cohorts found that people with diabetes who followed four or five healthy lifestyle factors, such as not smoking, staying physically active, eating a healthy diet, maintaining a moderate weight, and limiting alcohol, had roughly 40% lower all-cause mortality and about 42% lower cardiovascular mortality compared to those following zero or one healthy habits.¹⁶

A UK Biobank analysis reinforced this, finding that people with type 2 diabetes who scored highest on a composite lifestyle index had less than half the mortality risk of those who scored lowest. The same study estimated that nearly 30% of deaths among people with type 2 diabetes were attributable to a poor lifestyle.¹⁷ That is a remarkable number, because it means that a large chunk of the excess mortality associated with diabetes is not an inevitable consequence of the disease but rather the result of modifiable behaviors.

None of these lifestyle factors are surprising on their own. What the data emphasizes is that they stack. Each additional healthy behavior chips away at risk in a roughly additive fashion. You do not have to do everything perfectly. But doing several things moderately well appears to matter more than doing one thing extremely well.

When Type 2 Diabetes Goes Into Remission

Remission from type 2 diabetes, defined as sustained normal blood-sugar levels without medication, is possible for some people, usually through substantial weight loss early in the course of the disease. The Look AHEAD trial, which followed participants for years, found that those who achieved remission at any point during follow-up had a 33% lower rate of chronic kidney disease and a 40% lower rate of cardiovascular events compared to those who never entered remission, even after accounting for differences in blood sugar, blood pressure, and lipid levels.¹⁸ The longer remission lasted, the greater the benefit.

Remission is not a cure. Many people who achieve it eventually see their blood sugars creep back up, especially if weight is regained. But the cardiovascular and kidney protection appears to persist to some degree even after remission ends, echoing the “legacy effect” of good blood-sugar control. If you have been diagnosed with type 2 recently and still have significant insulin-producing capacity, pursuing remission through weight loss may be one of the most impactful things you can do for long-term survival.

Newer Medications That Protect Beyond Blood Sugar

Two classes of diabetes drugs developed in the past decade have shifted the conversation from simply lowering blood sugar to directly protecting the heart and kidneys. SGLT2 inhibitors, like empagliflozin, were shown to reduce cardiovascular death and heart failure hospitalization relatively quickly, through mechanisms that appear to involve changes in fluid balance and heart metabolism rather than blood-sugar control alone. GLP-1 receptor agonists, like liraglutide and semaglutide, also reduced major cardiovascular events, though more slowly and through different pathways.¹⁹

These drugs matter for life expectancy because heart disease and kidney disease are the two main killers in diabetes. Having medications that directly lower those risks, independent of their blood-sugar effects, represents a genuine step change in treatment. They are now routinely recommended for people with type 2 diabetes who have or are at high risk for cardiovascular or kidney disease, and their widespread adoption is one reason the life-expectancy gap has been narrowing in recent years.

Diabetes, Cancer, and Dementia

Diabetes raises the risk of several cancers. A national observation study found that type 2 diabetes increased the overall risk of cancer by about 10%, but the distribution was uneven. The biggest increases were for liver cancer, with more than three times the risk, and pancreatic cancer, with about twice the risk. Uterine cancer was also elevated, while breast and colorectal cancers showed smaller increases. Critically, once a cancer developed, people with type 2 diabetes also had roughly 23% higher post-cancer mortality.²⁰

Dementia is another downstream risk that gets less attention but substantially affects quality of life and total healthy years. People with diabetes experience their first cognitive impairment about three to four years earlier than people without diabetes, and they spend four to six fewer years of their life in a cognitively healthy state.²¹ Type 1 diabetes carries about double the overall dementia risk compared to the general population, with the highest elevation seen in vascular dementia, which makes sense given the blood-vessel damage that diabetes causes.²² Higher blood sugar, higher blood pressure, and a history of stroke all compound the risk.

Mental Health and Diabetes Burnout

Depression and diabetes distress are common among people with diabetes, and they are not just quality-of-life problems. Both are associated with worse disease management, higher rates of complications, and increased mortality.²³ Depression makes it harder to keep up with blood-sugar monitoring, medication, exercise, and dietary changes. Diabetes distress, which is the frustration and exhaustion that comes from the relentless daily management burden, can lead to the same behavioral slippage even in people who do not meet the clinical threshold for depression. Research from Australia’s National Diabetes Audit found that diabetes distress was directly associated with higher HbA1c levels, suggesting it erodes blood-sugar control through reduced self-care.²⁴

This creates a vicious cycle: poor control leads to complications, complications increase distress, and distress further undermines control. Addressing mental health is not a luxury add-on to diabetes care. It is a survival-relevant intervention. If you are struggling with the daily grind of diabetes management, that is worth bringing up with your care team, because the downstream effects on your physical health are real and measurable.

People Who Have Lived Decades With Type 1 Diabetes

Exceptional longevity with diabetes does happen, and studying the people who achieve it reveals useful patterns. A study of people who had lived with type 1 diabetes for more than 50 years, called the “Golden Years Cohort,” found some consistent traits. They tended to have normal body weight, use relatively low insulin doses, and have elevated HDL cholesterol, the “good” cholesterol associated with cardiovascular protection. Their average HbA1c was 7.6%, which is above the normal range but not extreme. They also tended to have long-lived parents and to drink moderate amounts of alcohol.²⁵

A broader review of why some people with type 1 diabetes survive so long highlighted the absence of kidney disease as a major marker. If someone with type 1 avoids developing significant kidney damage within the first 15 to 20 years, that appears to signal long-term survival. The review also pointed to insulin sensitivity and the absence of metabolic syndrome features as protective, along with genetic factors like a family history of longevity and the absence of type 2 diabetes or hypertension in relatives.²⁶ In short, some of the protective factors are things you can influence, like weight and blood pressure, while others are genetic luck.

How Much Has Improved Over Time

The life-expectancy picture for diabetes has improved dramatically over the past several decades, and it is still improving. In a long-running Pittsburgh cohort study, people with type 1 diabetes diagnosed between 1965 and 1980 had an estimated life expectancy at birth of about 69 years, roughly 15 years longer than those diagnosed between 1950 and 1964.²⁷ That 15-year jump in a single generation reflects the accumulated impact of better insulin formulations, home blood-sugar monitoring, improved treatment of blood pressure and cholesterol, and more aggressive management of complications.

Finnish data shows the trend continuing into recent years. By 2017, a 20-year-old with type 1 diabetes in Finland could expect about 52 more years of life, a gap of roughly 10 years compared to the general population.²⁸ That gap is real, but it is considerably smaller than it was a generation ago. For type 2, the gains have been similarly large, driven by newer medications with cardiovascular and kidney benefits, wider use of statins and blood-pressure drugs, and better screening for complications.

The trajectory matters as much as the current snapshot. Someone diagnosed with diabetes today is entering a treatment landscape that will continue to evolve over the decades they live with the disease. Artificial-pancreas systems, next-generation kidney-protective drugs, and potential beta-cell therapies are all in various stages of development. The life-expectancy estimates from even recent studies are based on populations that did not have access to today’s best tools, which means the actual outlook for someone diagnosed now may be better than any published number yet reflects.