Scientists Refute The Blood Type Diet, Again

Scientists Refute The Blood Type Diet, Again

Key points:

  • The blood type diet suggests one’s blood type should dictate their dietary choices.
  • Once widespread, this diet has proven wrong many times.
  • A new study on a vegan diet also debunks the blood type diet theory.

The blood type diet is a theory to achieve ideal body weight and improve overall health; one should make their food choices according to their blood type. The thesis first appeared in a book by a naturopathic physician Peter D’Adamo in 1996, gained massive popularity around the world. 

D’Adamo’s main point is that the blood type determines one’s ability to digest certain foods, so adjusting what you eat to your blood type would improve digestion, help lose extra weight, and prevent diseases.

Although the blood type diet has been disproved many times in numerous studies, people continue asking their physicians whether they should give it a try. Recent research debunks this diet once again.

In his 4-month study, Dr. Neal Barnard focused on two recommendations of a blood type diet: 

  • People with blood type O should eat plenty of meat.
  • People with blood type A should follow a plant-based diet.

The analysis didn’t show any significant differences in health outcomes between participants of blood type O and non-O and between those of blood type A and non-A. 

“Our research shows that all blood types benefit equally from a vegan diet based on the consumption of fruits and vegetables, legumes and whole grains, looking specifically at weight loss and cardiometabolic health in overweight adults,” Barnard comments on his findings.


New study debunks blood type diet

Diet not working? Maybe it’s not your type