Does Blood Type Affect Longevity? What Research Says About Living to 100

Living to 100 has long fascinated scientists, families, and communities around the world. Why do some people remain active well into their 90s and beyond, while others develop age-related diseases much earlier? Researchers have studied genetics, diet, physical activity, sleep, environment, medical care, and countless other factors in an effort to understand exceptional longevity.

One question that occasionally comes up is whether blood type affects how long a person lives.

The ABO blood group system divides blood into four familiar types: A, B, AB, and O. Because blood type is inherited, researchers have investigated whether these genetic differences might be connected with certain diseases and, ultimately, lifespan.

The answer is more complicated than social media headlines sometimes suggest.

Current research does not show that having one particular blood type guarantees that you will live longer or reach 100. Some studies have found associations between ABO blood groups and certain cardiovascular or blood-clotting conditions, while research specifically examining centenarians has produced mixed findings.

In other words, blood type may be associated with certain health risks, but it is not a reliable predictor of whether someone will become a centenarian.

What Are the Different Blood Types?

The ABO blood group system consists of four primary blood types:

• Type A

• Type B

• Type AB

• Type O

Your blood type is determined largely by inherited genetic variations from your parents.

The main difference between these blood groups is the presence or absence of specific antigens on red blood cells. These differences are particularly important when doctors determine compatible blood for transfusions.

Blood type is therefore medically significant, but its role extends beyond transfusion medicine. Researchers have found associations between ABO blood groups and several diseases, which has led scientists to investigate whether blood type could also influence long-term health and longevity.

Why Would Blood Type Be Connected to Longevity?

At first, blood type and lifespan might seem completely unrelated. However, the ABO blood group system can influence certain biological processes.

Research has found differences among blood groups in levels of proteins involved in blood clotting. People with non-O blood types, for example, tend to have higher levels of certain coagulation-related proteins than people with type O blood.

Because abnormal blood clotting is involved in conditions such as deep-vein thrombosis, pulmonary embolism, heart disease, and stroke, scientists have investigated whether blood type might influence the risk of these conditions.

This is where the connection to longevity becomes interesting.

If a particular blood group is associated with a slightly different risk of certain diseases, it could theoretically influence health outcomes over many decades.

However, an association with disease risk is not the same thing as an effect on overall lifespan.

Does Blood Type O Help You Live Longer?

Blood type O has received considerable attention in studies examining cardiovascular and clotting risks.

Some research suggests that people with type O blood may have a lower risk of certain thrombotic conditions than people with non-O blood types. Other studies have reported associations between non-O blood groups and coronary artery disease.

These findings have sometimes been interpreted online as evidence that type O is a “longevity blood type.”

That conclusion goes too far.

A lower risk of one particular condition does not automatically translate into a longer overall lifespan. Human longevity is influenced by many factors, including smoking, blood pressure, cholesterol, diabetes, physical activity, diet, genetics, infections, healthcare access, and environmental factors.

Therefore, having type O blood should not be viewed as a guarantee of living longer.

What About Blood Type B?

Blood type B has also attracted attention because of research involving centenarians.

One study conducted in Japan examined people who had reached 100 years of age and reported that blood type B was more common among the centenarians than expected in the comparison population.

This finding was interesting because it raised the possibility that ABO blood group might somehow be connected to exceptional longevity.

However, subsequent research has not consistently reproduced this result.

Other studies involving older populations have failed to find a meaningful relationship between blood type B and longer survival. This illustrates an important principle in medical research: a finding from one population does not necessarily apply to everyone.

Differences in genetics, environment, lifestyle, healthcare, and study design can produce different results.

What Do Studies of Centenarians Show?

Researchers have specifically studied the blood types of people who reach 100 or more.

Some investigations have reported differences in blood-type distribution among exceptionally old individuals. Others have found no significant association.

For example, research involving centenarians in Sicily found no meaningful difference in ABO blood groups that could explain exceptional longevity.

Another large study examined thousands of Chinese participants, including more than 2,000 centenarians. The researchers did not find a significant association between ABO blood type and longevity.

These findings suggest that reaching 100 cannot be explained simply by having one particular ABO blood group.

Why Do Research Results Conflict?

It is common for studies examining complex biological traits to produce different results. Several factors may explain why blood-type and longevity research has not reached a simple conclusion.

Different Populations

The frequency of blood types varies significantly between populations.

A blood group that is relatively common in one country may be uncommon in another. Genetic backgrounds and environmental conditions also differ.

As a result, an association observed in one population may not appear elsewhere.

Different Lifestyle Patterns

Lifestyle can have a major influence on health and lifespan.

Diet, physical activity, smoking, alcohol consumption, sleep, stress, social relationships, and healthcare access can all affect health outcomes.

These factors can make it difficult to isolate the relatively small contribution that blood type might make.

Different Research Methods

Studies may differ in their design, sample size, age groups, comparison populations, and methods of analysis.

A study of hospital patients may produce very different results from a study specifically examining healthy centenarians.

Disease Risk Is Not the Same as Lifespan

This is perhaps the most important point.

Suppose researchers discover that people with one blood group have a slightly higher risk of a particular cardiovascular condition.

That does not mean those people will necessarily die younger.

Modern medicine can diagnose and treat many conditions that once shortened people’s lives. Preventive care and lifestyle choices can also change outcomes.

Blood Type and Cardiovascular Health

The strongest scientific interest in ABO blood groups has involved cardiovascular and blood-clotting conditions.

Non-O blood groups have generally been associated with higher levels of certain clotting proteins compared with blood group O. Researchers have also found associations between non-O blood groups and some thrombotic events.

Some studies have reported an association between blood type A and increased risk of coronary artery disease compared with blood type O.

However, these differences should be placed in perspective.

A person’s overall cardiovascular risk depends on a much broader collection of factors, including:

• Blood pressure

• LDL cholesterol

• Smoking

• Diabetes

• Physical activity

• Diet

• Obesity

• Family history

• Age

• Kidney health

• Sleep and other lifestyle factors

Knowing your blood type does not replace routine cardiovascular screening.

Can Blood Type Predict Whether You’ll Reach 100?

At present, there is no reliable blood-type test that can predict whether you will become a centenarian.

People with all four major blood types have lived beyond 100.

This makes sense because longevity is a complex trait. Hundreds of genetic factors may contribute to aging and disease susceptibility, while environmental and lifestyle factors can have substantial effects throughout a person’s life.

Even identical twins, who share nearly all of their genetic material, do not necessarily have identical lifespans.

Therefore, reducing longevity to a single blood-type category oversimplifies a much more complicated biological process.

Genetics and Exceptional Longevity

Genetics do play a role in longevity.

Some families have unusually high numbers of people who live into their 90s or beyond. Researchers have identified genetic variants that may influence processes related to cholesterol metabolism, inflammation, cellular repair, and other aspects of aging.

But there is no single “longevity gene” that guarantees a person will reach 100.

Instead, exceptional longevity appears to result from a combination of genetic advantages, healthy behaviors, favorable environments, medical care, and sometimes simple biological luck.

Blood type is only one small part of a person’s genetic profile.

What Can You Do to Support Healthy Aging?

If your goal is to increase your chances of living a long and healthy life, there are much more useful areas to focus on than your ABO blood group.

Don’t Smoke

Avoiding tobacco is one of the most important steps for reducing the risk of numerous serious diseases.

If you smoke, quitting can provide health benefits at virtually any age.

Stay Physically Active

Regular physical activity supports heart health, muscle strength, bone health, balance, and independence as you age.

Walking, strength training, cycling, swimming, and other enjoyable activities can all contribute to an active lifestyle.

Eat a Balanced Diet

A diet emphasizing vegetables, fruits, whole grains, legumes, nuts, seeds, and appropriate sources of protein can provide a wide variety of essential nutrients.

Rather than searching for a single “longevity food,” focus on the overall quality of your eating pattern.

Maintain Healthy Blood Pressure

High blood pressure can damage blood vessels over time and increase the risk of heart disease and stroke.

Regular monitoring and appropriate treatment are important components of healthy aging.

Pay Attention to Cholesterol and Blood Sugar

Elevated cholesterol and uncontrolled blood sugar can contribute to cardiovascular and other health complications.

Routine health checks can identify potential problems early.

Get Adequate Sleep

Good-quality sleep supports physical recovery, cognitive health, mood, and overall well-being.

Persistent sleep problems are worth discussing with a healthcare professional.

Maintain Social Connections

Healthy aging isn’t only about avoiding disease.

Maintaining friendships, family relationships, hobbies, meaningful activities, and a sense of purpose can contribute to quality of life as people grow older.

Should You Be Worried About Your Blood Type?

For most people, there is no reason to worry about their ABO blood type in relation to longevity.

Knowing your blood type can be useful for medical purposes, but it should not be treated as a personal lifespan prediction.

If research identifies a small difference in disease risk between blood groups, that information is most useful at a population level. It does not mean that an individual with type A, B, AB, or O blood is destined for a particular health outcome.

Instead, pay attention to health factors that can actually be measured and managed.

Frequently Asked Questions

Which blood type is most likely to live to 100?

No ABO blood type has been proven to consistently increase the likelihood of reaching 100. Research involving centenarians has produced mixed findings.

Is type O blood associated with longer life?

Type O has been associated with lower risk of some blood-clotting and cardiovascular outcomes in certain studies. However, this does not prove that people with type O blood live longer overall.

Does blood type B increase longevity?

A few studies have reported an association between type B and exceptional longevity, but other research has not confirmed the finding. There is currently insufficient evidence to describe type B as a longevity blood type.

Does blood type A increase the risk of heart disease?

Some studies have found associations between blood type A and certain cardiovascular risks. However, many other factors have a much greater influence on an individual’s overall heart-health risk.

Can you change your blood type through diet?

No. Your ABO blood type is genetically determined and cannot be changed through diet, exercise, supplements, or lifestyle.

What matters more than blood type for healthy aging?

Smoking status, physical activity, diet, blood pressure, cholesterol, blood sugar, sleep, preventive healthcare, and other lifestyle and environmental factors are much more practical areas to focus on.

Final Thoughts

The idea that your blood type determines how long you will live is appealing because it offers a simple answer to a complicated question. Unfortunately, current research does not support such a simple conclusion.

There are genuine biological differences between ABO blood groups, and researchers have found associations between blood type and certain cardiovascular, clotting, and other health conditions. But studies specifically examining longevity and centenarians have produced inconsistent results.

People of every major blood type have reached 100 and beyond.

Ultimately, exceptional longevity is likely influenced by a combination of genetics, lifestyle, environment, medical care, socioeconomic circumstances, and chance. Your blood type is only one small feature of a much larger biological picture.

If you want to support your chances of living a long and healthy life, concentrate on the factors you can influence: don’t smoke, remain physically active, eat a balanced diet, maintain healthy blood pressure and cholesterol, get appropriate preventive care, sleep well, and stay socially connected.

Your blood type may be interesting to know, but it shouldn’t define your expectations for the future. Living well for as long as possible involves far more than the letter written on your blood-type record.