Researchers show which blood group has the lowest cancer risk

Researchers show which blood group has the lowest cancer risk

For decades, researchers have explored how blood types may influence the risk of various diseases, from heart problems to infections and even certain cancers. Recent studies now suggest that blood type could play a modest role in determining the risk of some cancers. However, these findings don’t imply that anyone is either “safe” or “doomed” — they simply highlight patterns worth considering.

Across numerous large-scale studies and meta-analyses, one blood type consistently appears to show a slight advantage: people with blood type O seem to have the lowest overall cancer risk compared to those with A, B, or AB blood types.

The connection, first noted in older research, has been reinforced by recent studies involving tens of thousands of patients worldwide. Researchers have focused on the ABO blood system — the most common blood classification — and analyzed its relationship with cancer incidence. While the trend is noticeable, it is subtle enough that it shouldn’t guide lifestyle decisions. Still, the findings are intriguing and could eventually help scientists understand how the immune system, inflammation, and cell growth interact.

What Does the Evidence Show?

Gastric (stomach) cancer exhibits one of the most robust associations with blood type. Multiple studies, including those published in BioMed Central and PLOS, found that people with blood type A or AB are at higher risk for gastric cancer compared to those with blood type O. This may be linked to how certain blood antigens interact with Helicobacter pylori, a bacterium known to cause ulcers and increase the risk of stomach cancer. Antigens in type A blood might make it easier for this bacteria to attach to the stomach lining, leading to chronic inflammation that can eventually cause cancer.

Similarly, pancreatic cancer follows a comparable trend. Data from the National Institutes of Health and other peer-reviewed sources show that people with non-O blood types (A, B, or AB) have a moderately higher risk than those with type O. Again, the proposed explanation involves inflammation and immune response, with blood antigens possibly influencing how the immune system identifies or fails to identify abnormal cell growth. Buy vitamins and supplements

Continue reading…