Is there a connection between blood type and diet?

The popular blood type diet theory, which gained widespread recognition thanks to naturopath Peter D'Adamo's research, continues to attract public attention. In his bestseller "Eat Right for Your Blood Type," the scientist proposed a revolutionary hypothesis about how different blood types can affect nutrient absorption and overall human health.

Basic Principles of the Blood Type Diet

1. Blood Type O (I) ("Hunters")

People with the first blood type are recommended a high-protein diet with emphasis on meat products, fish, and eggs. Specialists advise avoiding grains and dairy products, which can significantly reduce metabolic rate.

Those with the second blood type are prescribed predominantly plant-based food: various vegetables, fruits, grains, and legumes. Consumption of meat and dairy products should be minimized due to supposed difficulties with their digestion.

People with the third blood type are recommended a diverse diet including various types of meat (except chicken), dairy products, vegetables, and fruits. However, wheat, corn, and lentils should be excluded as they can disrupt metabolic processes.

For the fourth blood type, a combined diet is recommended, uniting the principles of groups A and B. The diet includes seafood, dairy products, and vegetables, while red meat and corn consumption should be limited.

Scientific Evidence

Despite the widespread popularity of D'Adamo's theory, the scientific community finds no convincing evidence of its validity. Modern research indicates that diet effectiveness is determined by the quality of consumed products rather than blood type. A large-scale study in 2014 found no significant correlations between blood type and the effectiveness of different types of nutrition.

Conclusion

Although the concept of eating according to blood type presents an interesting theory, it has not yet received scientific confirmation. Specialists recommend following a balanced diet considering individual body characteristics, rather than focusing exclusively on blood type.