Many people only think about their blood type during medical emergencies. However, researchers say that knowing your blood group may also provide useful insights into long-term health risks, including certain types of cancer.
A study published in 2015 suggested that among the four main blood groups, one type may be linked to a lower risk of developing some forms of cancer.
But before understanding the research, it helps to know how blood types are identified and why they matter.
Finding Out Your Blood Type
Learning your blood type is relatively simple. It can be determined through a routine blood test or when donating blood. In many cases, people discover their blood type during medical treatments or routine health screenings.
Some individuals also learn their blood group during pregnancy, as doctors often perform blood testing as part of prenatal care.
Although a person’s blood type is inherited from their parents, guessing your blood type based on family members is not reliable. Accurate testing is always required, especially in situations where a blood transfusion may be necessary.
The Four Main Blood Groups
Human blood is divided into four primary groups:
- A
- B
- AB
- O
Each of these blood types can also be classified as positive or negative. This depends on whether the blood contains a specific protein known as the Rh factor.
For example, a person may have A-positive, B-negative, O-positive, or AB-negative blood.
Which Blood Type May Have Lower Cancer Risk?
Over the past few decades, scientists have studied whether certain blood types are connected to specific health conditions.
Research has suggested that individuals with Type O blood may have a slightly lower risk of developing certain cancers, particularly stomach and pancreatic cancers, compared with people who have blood types A, B, or AB.
Other studies have also indicated that Type O blood may be linked to a reduced risk of colorectal cancer.
Meanwhile, individuals with blood types A, B, and AB have been observed in some studies to have a higher likelihood of developing certain digestive system cancers.
However, experts emphasize that these findings do not mean blood type alone determines cancer risk.
Important Medical Perspective
Medical professionals explain that cancer risk is influenced by many factors, including genetics, lifestyle, diet, environment, and overall health.
Blood type may play a small role in how the body responds to certain infections or biological processes, but it is not considered a direct cause of cancer.
For this reason, doctors stress the importance of regular health screenings, balanced nutrition, and maintaining a healthy lifestyle to reduce long-term health risks.
Modern medical research continues to explore how genetics, blood group science, preventive healthcare, cancer screening technologies, and advanced laboratory diagnostics can help doctors detect diseases earlier and improve treatment outcomes. Healthcare services such as genetic testing, oncology screening programs, diagnostic laboratories, and preventive health checkups play a critical role in identifying potential health risks and helping individuals make informed decisions about their long-term health.
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