Which Blood Type Is More Prone to Alzheimer's? Research Has the Answer.

“What’s your blood type?”

When meeting new friends, this question often serves as an icebreaker.

Conversations about the traits linked to various blood types can quickly develop—some think that blood type correlates with personality, such as Type A being meticulous and rule-following, while Type B is more carefree and disregards rules...

Many are also eager to explore the connection between blood types and health, like the notion that “certain blood types attract mosquitoes” or “some blood types have better immunity.” But is there any truth to these claims?

Blood Type and Health Predictions

Blood types are primarily classified based on different antigens—Type A blood features A antigens on red blood cells, Type B has B antigens, Type AB has both, and Type O lacks surface antigens.

These antigen differences indicate variations in DNA, leading to significant differences in physical health. This means that the risk of diseases in organs and tissues can vary by blood type.

Therefore, the notion that blood type can predict health conditions has some merit.

Is there also a link between blood type and brain aging rates? Which blood type experiences faster brain aging?

AB Blood Type and Faster Brain Aging

A study published in the neurology section of the Journal of the American Medical Association reveals that individuals with AB blood type are 82% more likely to face cognitive and memory difficulties compared to other blood types, suggesting they're at higher risk for brain diseases later in life.

This outcome is mainly due to Factor VIII. Higher levels of Factor VIII are linked to an increased risk of cognitive impairment and dementia. People with AB blood type have significantly higher levels of Factor VIII than those with other blood types.

Factor VIII primarily aids in blood clotting, with its concentration directly affecting the degree of blood coagulation. In simple terms, high Factor VIII levels can lead to more severe blood circulation issues, which increases the risk of brain ischemia and hypoxia, affecting brain function and raising the risk of dementia.

O Blood Type: Lower Risk of Brain Diseases

Varying amounts of gray matter in the brain are associated with different blood types. Notably, O blood type individuals have more gray matter near the cerebellum.

Gray matter is vital to the central nervous system and processes information in the brain. More gray matter means stronger neural connections, which leads to better memory and a lower risk of dementia.

Research has established a correlation between blood type and brain aging rate. Since blood type is unchangeable, how can we adjust our daily habits to slow brain aging?

Correcting Three Habits to Slow Brain Aging

1. The Brain Needs Adequate Sleep

Cerebrospinal fluid helps “clean” the brain by removing “waste” produced by brain cells and is more active during sleep, increasing by 60% compared to when awake.

If you frequently stay up late or have insomnia, your brain may continue producing “waste” while the cerebrospinal fluid's cleaning ability is diminished. Over time, this can raise the risk of brain decline.

Additionally, poor sleep can cause glial cells to consume neurons they usually protect. Excessive neuron loss due to this leads to brain atrophy and symptoms like memory decline and dementia, an irreversible process.

Generally, adults should aim for 7 to 9 hours of sleep per night, adjusting for individual needs to ensure feeling refreshed upon waking.

2. Inadequate Hydration Can Affect the Brain

The brain uses a lot of energy and requires adequate oxygen supply, with about 20% of the body's blood flowing to the brain. Dehydration affects this flow, causing brain cells to become dehydrated.

A UK study showed signs of brain shrinkage in dehydrated adolescents. Chronic or severe dehydration could impair cognitive abilities!

Healthy individuals should drink 1500 to 1700 ml of water daily, adjusting for hot weather or sweating. People with heart or kidney conditions should consult their doctor about fluid intake.

Breakfast Habits and Dementia: A Japanese Study

Published in the Journal of Human Science in Health and Social Services in Japan, this six-year-long study involved 525 participants aged 65 and older.

After observing dietary and lifestyle habits, researchers found that, after adjusting for gender and age, those who skipped breakfast had a fourfold increase in dementia risk compared to others.

The cause is inadequate nutrient intake, leading to premature brain aging and functional decline. The study also identified three other dementia-related factors:

• Participants who often snacked had a 2.7 times higher risk of dementia;
• Those neglecting salt intake had a 2.5 times higher risk;
• Participants ignoring nutritional balance had a 2.7 times higher risk.

Excessive snacking can increase fat intake, elevating blood cholesterol and raising beta-amyloid protein accumulation in the brain, significantly increasing dementia incidence; high salt intake can disturb brain endothelial cells, causing hypertension and cortical atrophy.

Do any of these habits sound familiar?

Besides addressing these habits early, you can also supplement nutrients that bolster “brain power.”

Nutrients to Enhance Brain Function

1. Omega-3 Fatty Acids

Clinical trials show that Omega-3 fatty acids improve cognitive function in younger individuals, maintain normal cognitive abilities, and prevent age-related decline.

Fish and seafood like salmon, halibut, tuna, oysters, and shrimp are rich in Omega-3 fatty acids. Nuts such as walnuts, almonds, and pecans also contain Omega-3s.

2. Flavonoids

Studies suggest those who consume more flavonoids have a reduced risk of cognitive decline.

Compared to the bottom fifth of participants with flavonoid intake (149mg/day - 153mg/day), those in the top fifth (601mg/day - 618mg/day) had a 19% lower risk of cognitive decline.

Plant-based foods are excellent sources of flavonoids. Foods like onions, parsley, red cabbage, berries, citrus fruits, tea, legumes, and soy are rich in flavonoids and should be consumed more often.