Blood Type and Longevity is one of those health topics that sounds almost too intriguing to ignore. If blood type influences transfusions, clotting, and certain disease risks, could it also help explain why some people live to 100 while others do not?
Scientists have explored that possibility for years. Some studies have found interesting differences in the distribution of ABO blood types among exceptionally old adults. However, other studies have found no meaningful connection at all. A large Chinese centenarian analysis, for example, concluded that ABO genetic variants and blood groups did not associate with longevity, while earlier Japanese research reported a higher proportion of blood type B among centenarians. (pmc.ncbi.nlm.nih.gov)
That inconsistency matters.
Right now, no blood type guarantees exceptional longevity, and no clinician can look at A, B, AB, or O and predict whether someone will reach 100.
Meanwhile, a large Swedish study offers a more useful clue. Researchers followed tens of thousands of older adults for decades and found that people who eventually reached 100 tended to show somewhat different patterns in several routine blood biomarkers years earlier. (pmc.ncbi.nlm.nih.gov)
The bigger story, therefore, may not be the letters on your blood-type card. It may be how well your metabolic, kidney, liver, and nutritional systems function over time.
I first became curious about blood type and lifespan after hearing someone confidently claim that one particular type was the “centenarian blood type.” The idea sounded convincing because it came wrapped in scientific language. However, when I looked more closely, the research told a much more complicated story. One study suggested a possible advantage for one blood group, while another found no meaningful relationship. Meanwhile, much larger longevity research kept pointing toward everyday health markers such as glucose and kidney function. That changed my perspective. Blood type remained biologically interesting, but it stopped feeling like destiny. The factors we monitor and influence throughout life seemed far more useful than a letter inherited at birth.
What the Centenarian Research Actually Found
The Swedish Study Followed More Than 44,000 People
One of the most interesting recent studies related to Blood Type and Longevity did not actually focus on ABO blood type at all.
Instead, researchers examined blood biomarkers in 44,636 participants from the Swedish AMORIS cohort and followed them for as long as 35 years. Among those participants, 1,224 eventually reached their 100th birthday, and about 85% of the centenarians were women. (pmc.ncbi.nlm.nih.gov)
The researchers compared twelve blood-based biomarkers involving inflammation, metabolism, liver function, kidney function, anemia, and nutrition.
Centenarians tended to show lower levels of glucose, creatinine, and uric acid beginning relatively early in older adulthood. They also showed differences in several liver-related markers and total cholesterol. (pmc.ncbi.nlm.nih.gov)
However, the findings do not mean that one particular laboratory number determines lifespan.
The study was observational.
That means researchers found patterns among people who lived exceptionally long lives, but they could not prove that changing a single laboratory value would cause someone to become a centenarian.
Still, the findings remain useful because they suggest that exceptional longevity may reflect relatively favorable function across multiple physiological systems over many years.
That idea makes far more sense than searching for one magical longevity marker.
Balance Mattered More Than Perfect Numbers
The Swedish research also produced a subtle finding that headlines sometimes miss.
Centenarians did not simply have the lowest possible value for every biomarker.
Instead, many future centenarians appeared less likely to occupy the extreme ends of several laboratory ranges. The authors described centenarians as displaying relatively homogeneous biomarker profiles from age 65 onward. (pubmed.ncbi.nlm.nih.gov)
For example, lower glucose and creatinine levels associated with a greater likelihood of reaching 100 compared with higher levels.
That pattern fits with what clinicians already understand about metabolic and kidney health.
However, a longevity study cannot tell you what your individual “perfect” number should be.
Laboratory values require interpretation in context.
Age, medications, muscle mass, hydration, medical conditions, and laboratory methods can all influence results.
Therefore, the useful lesson from Blood Type and Longevity research is not to obsess over isolated numbers.
Instead, monitor health trends with a clinician and address meaningful problems when they appear.
Blood pressure, blood glucose, kidney function, cholesterol, nutrition, physical activity, and other factors can all become part of that broader picture.
Does ABO Blood Type Influence How Long You Live?
Studies Have Produced Conflicting Results
This is where Blood Type and Longevity becomes much less certain.
One frequently discussed Japanese study compared 269 centenarians with 7,153 controls and found blood type B more commonly among centenarians. That finding led researchers to suggest that type B might associate with exceptional longevity in that population. (pmc.ncbi.nlm.nih.gov)
However, other research did not reproduce that conclusion.
A study of Sicilian centenarians found no significant difference in ABO blood-group distribution compared with controls. (pubmed.ncbi.nlm.nih.gov)
More importantly, a larger Chinese investigation analyzed ABO alleles, genotypes, and blood types in a substantial centenarian population and concluded that ABO genetic variants did not associate with human longevity. (pmc.ncbi.nlm.nih.gov)
A 2025 study examining people aged 85 and older similarly concluded that ABO and Rh blood-group diversity did not appear to represent a significant determinant of longevity in that population. (journals.lww.com)
Taken together, the evidence does not support naming one universal “longevity blood type.”
Population genetics can vary.
Blood-type frequencies differ among regions and ancestral groups.
Additionally, studies of centenarians often involve relatively small numbers compared with the enormous populations needed to understand subtle genetic effects reliably.
Blood Type Can Influence Certain Disease Risks
Although blood type does not reliably predict lifespan, ABO biology is not meaningless.
Researchers have found associations between blood groups and certain cardiovascular outcomes.
Large cohort studies have reported that people with non-O blood groups may experience moderately greater coronary heart disease risk than people with type O. (pubmed.ncbi.nlm.nih.gov)
ABO blood type also influences levels of von Willebrand factor and factor VIII, proteins involved in blood clotting. These differences help explain why non-O blood groups have been associated with higher venous thromboembolism risk in many studies. (pmc.ncbi.nlm.nih.gov)
However, relative risk does not equal destiny.
Someone with type O can still develop heart disease.
Someone with type A, B, or AB can live a long and healthy life.
Furthermore, doctors do not generally base everyday cardiovascular prevention on ABO type alone.
Established risk factors such as smoking, high blood pressure, diabetes, cholesterol abnormalities, kidney disease, family history, age, diet, and physical activity provide much more actionable information.
That distinction keeps Blood Type and Longevity in perspective.
Your blood type may influence biological tendencies.
It does not write your life expectancy in advance.
What May Matter More Than Your Blood Type
Metabolic and Cardiovascular Health Add Up Over Decades
A century-long life does not usually result from one decision.
Instead, health accumulates.
Blood pressure maintained over decades matters.
So does glucose regulation.
So does avoiding tobacco.
Regular physical activity matters.
Nutrition matters.
Sleep, medical care, socioeconomic conditions, environmental exposures, genetics, and simple chance all enter the picture.
That is why the Swedish biomarker findings remain so interesting.
Future centenarians showed differences in multiple physiological markers long before reaching 100, suggesting that exceptional aging may involve sustained health across several body systems rather than one extraordinary characteristic. (pmc.ncbi.nlm.nih.gov)
Glucose offers a useful example.
Persistently elevated blood glucose can contribute to vascular, kidney, nerve, and other complications over time when diabetes develops and remains poorly controlled.
Creatinine provides information related to kidney filtration, although clinicians interpret it according to factors such as age, sex, body composition, and estimated glomerular filtration rate.
Similarly, liver-associated enzymes can provide clues about liver and biliary health without functioning as simple longevity scores.
Therefore, Blood Type and Longevity research should motivate routine healthcare rather than self-testing obsession.
One laboratory result does not tell your future.
Trends do.
Social and Behavioral Factors Matter Too
Blood tests cannot capture every feature of healthy aging.
People live inside environments, families, communities, jobs, and economic circumstances.
Regular movement, access to medical care, social connection, adequate nutrition, and lower exposure to harmful substances can all influence long-term health.
Genetics matter too.
Centenarians may inherit combinations of genetic variants that support resilience against some diseases. However, even genetic advantages interact with environment and behavior.
That is why two siblings can share much of their DNA yet experience very different health trajectories.
Likewise, two people with identical ABO blood types can have dramatically different cardiovascular risk profiles.
One might smoke, remain sedentary, have poorly controlled hypertension, and rarely receive preventive care.
The other might exercise regularly, avoid tobacco, treat hypertension, maintain strong social connections, and receive routine screenings.
Their shared blood type tells us surprisingly little about which person will live longer.
That is the practical limitation of trying to turn Blood Type and Longevity into a prediction tool.
How to Use Longevity Research Without Chasing Myths
Know Your Numbers, but Don’t Worship Them
Longevity studies naturally attract attention because everyone wants clues about the future.
However, laboratory values work best as tools for medical care, not as scores in a competition to reach 100.
Attend routine checkups appropriate for your age and medical history.
Know your blood pressure.
Discuss glucose testing when appropriate.
Review cholesterol and kidney function with your healthcare professional.
Follow up on abnormal results rather than assuming you can correct them with a supplement or “longevity diet.”
Likewise, do not attempt to drive every laboratory number as low as possible.
The Swedish centenarian study does not provide a formula for manipulating blood values to guarantee longevity. It identifies associations between biomarker patterns and survival. (pmc.ncbi.nlm.nih.gov)
That difference matters.
Your clinician can interpret laboratory values according to your overall health.
Meanwhile, focus on behaviors with broad health benefits.
Move regularly.
Avoid smoking.
Manage diagnosed blood pressure, diabetes, and cholesterol problems appropriately.
Eat a varied diet built around nutrient-dense foods.
Protect sleep.
Maintain preventive care.
Those actions may sound less exciting than discovering a secret blood type, but they provide much more practical value.
Don’t Change Your Diet Based on ABO Type
Blood-type diets remain popular, but the idea that people should eat fundamentally different foods according to A, B, AB, or O has not gained strong scientific support.
More importantly, the research on Blood Type and Longevity does not show that people with one type need a special diet to preserve a supposed survival advantage.
Your dietary needs depend much more on your health conditions, nutritional requirements, allergies, culture, preferences, medications, and overall metabolic health.
A person with type O and kidney disease may need different nutrition guidance from another person with type O and no chronic disease.
Likewise, two people with blood type B can have entirely different calorie, protein, fiber, or sodium needs.
Blood type alone cannot capture that complexity.
If you want to use nutrition to support healthy aging, emphasize patterns rather than blood-group theories.
Choose vegetables and fruits regularly.
Include appropriate protein sources.
Favor fiber-rich foods.
Limit excessive highly processed food, added sugar, and sodium.
Choose unsaturated fats more often than saturated-fat-heavy choices when appropriate.
Then adjust the pattern with a clinician or registered dietitian if your health requires something more specific.
Frequently Asked Questions
Which blood type lives the longest?
Current research does not establish one ABO blood type as the universal longevity winner. Some Japanese research found type B more common among centenarians, while studies in Sicily and China found no meaningful ABO association with exceptional longevity. (pmc.ncbi.nlm.nih.gov)
Does type O mean you will live longer?
No. Type O has been associated with somewhat lower risk for certain thrombotic and coronary outcomes compared with some non-O groups, but that does not mean type O guarantees a longer lifespan. Many stronger lifestyle, medical, genetic, and environmental factors influence longevity. (pubmed.ncbi.nlm.nih.gov)
What did the Swedish centenarian study actually find?
Researchers followed 44,636 older adults for up to 35 years, and 1,224 reached age 100. Future centenarians tended to show more favorable profiles in several biomarkers, including glucose, creatinine, and uric acid, from age 65 onward. (pmc.ncbi.nlm.nih.gov)
Can blood tests predict whether I will reach 100?
No routine blood test can accurately tell an individual that they will become a centenarian. Biomarkers can help identify current health problems and risk factors, but longevity depends on many interacting influences.
Should I worry if my blood type is linked with higher heart risk?
No blood type should cause panic. ABO-related differences in cardiovascular risk remain modest compared with many established modifiable factors. Focus on blood pressure, cholesterol, diabetes risk, smoking, physical activity, and other clinically meaningful factors rather than trying to change something you inherited and cannot alter.
Conclusion
Blood Type and Longevity remains scientifically interesting, but the available research does not support the idea that one blood group holds a secret ticket to living past 100.
Some studies have found possible associations.
One Japanese study observed more blood type B among centenarians.
Other studies found no such advantage.
A large Chinese centenarian analysis found no association between ABO genetic variants and longevity, while later research in older populations has also questioned whether blood group meaningfully determines survival. (pmc.ncbi.nlm.nih.gov)
Blood type does influence certain aspects of biology.
Non-O blood types have associations with somewhat higher risks of several thrombotic and cardiovascular outcomes, partly because ABO genetics influence proteins involved in blood clotting. (pmc.ncbi.nlm.nih.gov)
However, that is very different from predicting lifespan.
The Swedish centenarian study provides a more useful message. People who eventually reached 100 tended to demonstrate relatively favorable patterns across several routine biomarkers many years earlier. (pmc.ncbi.nlm.nih.gov)
No single marker guaranteed survival.
No blood type guaranteed survival.
Instead, exceptional longevity appeared connected with a broader pattern of physiological resilience.
You cannot change whether you were born A, B, AB, or O.
You can pay attention to blood pressure.
You can avoid tobacco.
You can manage diabetes and cholesterol when they develop.
You can remain active.
You can eat well.
You can maintain social relationships and preventive medical care.
Reaching 100 will always contain an element of genetics and chance.
But healthy aging does not require waiting for a lucky blood type.
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