Certain blood types can affect how your digestive system processes food and how your gut microbiome develops.
Type A: May produce lower amounts of stomach acid, which can reduce the digestion of meat and protein-rich foods.
Type O: Usually has higher stomach acid, which helps with protein digestion, but potentially increases the risk of stomach ulcers if infected with H. pylori.
Type B: Often displays a more balanced digestive profile and tolerates dairy products better due to evolutionary adaptation.
It’s important to note that although the “blood type diet” has gained popularity, there is still limited and incomplete scientific evidence to support it.
Blood type and immunity
Blood type antigens act as immune markers, and they can influence how your body responds to pathogens. For example:
During the COVID-19 pandemic, some studies suggested that people with blood type O had a slightly lower risk of infection or serious outcomes compared to blood type A, although the findings were mixed and not definitive.
Blood type AB, which is rare, may have a more complex immune response, since both A and B antigens can affect antibody production and immune recognition.
