D'Adamo's Theory

• The idea that your dietary needs may change according to your blood group made its way to the west in 1996 with the publication of the book "Eat Right 4 Your Type" by Peter D'Adamo, N.D. Dr. D'Adamo claims that there are numerous health benefits in following a diet specifically tailored to your blood group. According to the Eat Right For Your Type website, a study involving more than 6,000 people found that three out of four of those who followed his blood type diet showed "significant improvement in a variety of health conditions." Eating the right diet for your blood type not only results in weight loss and maintenance of a healthy weight, but also leads to health improvements overall, such as more energy, better mental clarity, fewer digestive problems and higher resistance to stress.
  
  Dr. D'Adamo explains that your blood type determines how your body deals with nutrients, and each type tends to react well or badly to different types of foods. Your blood type also makes you susceptible to different diseases. Therefore, dietary changes will eliminate health problems stemming from adverse reactions to foods, helping you avoid disease and improving your health.
  
  

Type O Diet

• People with type O blood are thought to be directly descended from our hunting ancestors and hence need diets low in carbohydrates and high in protein. Type Os should eat meats, especially fish, and avoid dairy and wheat products. They can also consume more than the usual amount of olive oil. Type O people can consume a moderate amount of nuts, seeds, eggs, vegetables and fruit, but they should avoid carbohydrate-rich foods like pasta, rice and cereals.
  
  

Type B Diet

• Those with type B blood can be quite omnivorous. Thought to be descendants of ancient nomadic peoples, type Bs can eat a balanced proportion of almost any foods they want, from meats and dairy products to legumes and fruits. They should avoid processed foods, however.
  
  

Type A Diet

• The type A blood type is thought to have originated among ancient farmers. Type A people make good vegetarians, and can eat all they want of vegetables, fruits, nuts, beans, seeds, pasta, cereals and rice. Type As should avoid or severely limit meat and meat products.
  
  

Type AB Diet

• AB is the rarest blood type. The diet for type AB blood is a combination of those for types B and A. If you have type AB blood, you can eat a vegetarian diet, but you should still moderately consume meat, fish and dairy for optimal health.