Blood type diet

There are 4 blood groups - A, B, AB and O - and we each belong to one of them. The blood type diet dictates that each blood type has a susceptibility to certain diseases, benefits from specific exercises and should only eat certain foods.
The blood type diet has become enormously popular recently, and makes a lot of sense intuitively to many people. Many find that by switching their diet, the weight falls off while hardly trying.

Blood Type Diet: Basics

- Foundation

The blood type diet comes from the evolutionary theory of blood groups, first proposed by William C. Boyd. It states that our blood types have evolved in the same way as our species. In other words, we can draw a line from the earliest blood type, O, through history to the most recent, AB.
The order of evolution dictates the diet for each blood type. The idea is that we should look back in history and try, to some degree, to replicate the diet from the time of each blood type's evolution.
Much of the theory of the blood type diet rests on the actions of lectins, proteins found on the surfaces of foods that react differently with certain blood types.

- Diet

Here are the recommended diets for each blood type:
Blood Type O Diet (The Hunter)
The earliest blood group, associated with the hunter, tending to be muscular and active. So Type O dieters should stick to a high-protein diet heavy in meat but light on vegetables. Dairy and wheat products will lead to weight gain and should be avoided if possible. Coffee is also a strict no.
Blood Type A Diet (The Cultivator)
Type A evolved when humans began to build settlements and cultivate the land. The Type A diet therefore moves away from meat and emphasises vegetables. Carbs are fine, but meals should be very low fat. Dairy is also to be avoided, but coffee is beneficial.
Blood Type B Diet (The Nomad)
Blood type B supposedly evolved at a similar time to A, but is associated with a nomadic lifestyle and the herding of livestock. Dairy products are therefore an important part of this diet, along with a limited amount of meat.
Blood Type AB Diet (The Enigma)
Blood type AB is the most recently evolved type, and as you might expect its a combination of diets A and B. It is the most balanced diet, with a mixture of dairy, vegetables and meat.

Blood Type Diet: Pros

- There is no calorie counting on the blood type diet. You find the foods that suit you and can pretty much eat the quantity that you want. Your body is able to process these foods very efficiently.

- The blood type diet is inexpensive. You just need to buy the book, or even do some research online.

Blood Type Diet: Cons

- The blood type diet has no scientific studies to back up its claims. Some scientists dispute the effects of lectins that William Boyd proposes.