Is there any truth in the blood type diet?

Focus-Science and Technology - - Q & A - CHAR­LOTTE MCGUIN­NESS, GY

In 1996, a natur­opath named Peter D’Adamo ar­gued that eat­ing a diet ‘de­signed’ for your blood type (O, A, B, or AB) meant that your body would di­gest food more ef­fi­ciently, and you would lose weight and pre­vent dis­ease. The diet has proven im­mensely pop­u­lar, with mil­lions of fol­low­ers. Blood is in­deed in­volved in di­ges­tion: the di­ges­tive process oc­curs in the gut, and the nu­tri­ents are ab­sorbed and trans­ported by blood to the var­i­ous cells and or­gans. There is, how­ever, zero ev­i­dence that the dif­fer­ent macronu­tri­ents (glu­cose, amino acids and fatty acids) re­act to the four blood types in any ap­pre­cia­bly dif­fer­ent way. Our in­di­vid­ual bi­ol­ogy may well in­flu­ence how we re­spond to food, but not our blood type. There is no truth to this diet.

The A, B, O and AB blood types are dic­tated by the pres­ence or ab­sence of par­tic­u­lar sub­stances on the red blood cells

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