The Eat Right for Your Type diet encourages people to eat certain foods and avoid others based on their blood type — A, B, AB, or O.

This diet may suit those enthusiastic about a plan that doesn't involve tracking calories or fat grams, while others may find it difficult to stay within the diet's confines, a challenge made greater if more than one person in a household follows the diet — and has a different blood type.

What can you eat on this diet:

If you're blood type 'O' your digestive tract retains the memory of ancient times, says D'Adamo, so you're metabolism will benefit from lean meats, poultry, and fish. You're advised to restrict grains, breads, and legumes, and to enjoy vigorous exercise.

Type A flourishes on vegetarian diets, “the inheritance of their more settled and less warlike farmer ancestors,” says D'Adamo. The type A diet contains soy proteins, grains, and organic vegetables and encourages gentle exercise.

The nomadic blood type B has a tolerant digestive system and can enjoy low-fat dairy, meat, and produce but, among other things, should avoid wheat, corn, and lentils, D'Adamo says. If you're type B, it's recommended you exercise moderately.

The “modern” blood type AB has a sensitive digestive tract and should avoid chicken, beef, and pork but enjoy seafood, tofu, dairy, and most produce. The fitness regimen for ABs is calming exercises.

How the Diet Works:

D'Adamo rejects the idea that one diet fits all. With four unique blood types, why shouldn't we have four specialized diet plans, he asks.

The right diet for your blood type comes down to lectins, food proteins each blood type digests differently, D'Adamo maintains.

If you eat foods containing lectins incompatible with your blood type, he says, you may experience inflammation, bloating, a slower metabolism, even diseases such as cancer. The best way to avoid these effects is to eat foods meant for your blood type.

All foods fall into three categories on the Eat Right for Your Type diet:
Highly beneficial Neutral Prevention
Beneficial foods for your blood type act like medicine, neutral foods like food, while avoid foods “act like a poison,” says D'Adamo.

For example, type Os should steer clear of whole wheat and wheat germ because “eating gluten is like putting the wrong kind of octane in your car … it clogs the works,” D'Adamo says.

What the Diet Experts Say:

“Within the diet itself are generally good diet recommendations,” says David W. Grotto, RD, LD, a former spokesman for the Academy of Nutrition and Dietetics (formerly American Dietetic Association). “D'Adamo doesn't say avoid vegetables and fruit, for example — but his specific recommendations based on blood type — the science is not there to support it. I'm not aware that anyone has duplicated his research.”

The presumption that each blood types will thrive on certain foods but not others also gives Grotto pause. “I'm type O and apparently I should be feasting over road kill. Well, that doesn't work for me because I don't like too much meat.”

Overall Grotto does not recommend the diet, believing it pigeonholes people into dietary restrictions without taking into consideration individual needs and tastes.

Food for Thought:

As for why so many have embraced the Eat Right for Your Type diet, Wiley has a theory: “Dieting is one of those things people feel desperate about. … The blood-type diet sounds more scientific [than some others].”

But it's the very lack of a solid scientific background that rankles most experts.

“If this diet wasn't coming from the whole blood-type approach, I could recommend this,” says Grotto, “but the philosophy of blood type is very obscure and lacking in science.”


Six small meals a day can be a very good idea, as long as it fits into your lifestyle, you choose your meals carefully and aim for adequate lean or low fat protein at each meal. If you love exercise, this plan is for you but don't expect to look like the “after” pictures in just 12 weeks, warn experts, achieving body builder muscle physiques takes longer and more intensity than a 12 week basic program.

For more related information, refer Health education research journals

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