How Blood Type Affects Diet

Did you know that your blood type can affect how certain diets work? Read this and discover the incredible truth about how your body deals with the food you eat, especially when you are trying to gain or lose weight!

For all the different people from all the different walks of life who are overweight and all the different diets that are aimed at them, there are going to be some close matches and there are going to be some widely off-the-mark mismatches. Most people are aware of this problem and spend a lot of time trying to find the right diet to fit their own personal and individual needs.

But there is one factor that a lot of people overlook. Their blood type and the way it can influence the way their bodies metabolize food.

Dieting According to Blood Group

blood group dietThere is an entire diet program dedicated to ensuring a person eats according to their blood type needs rather than environmental or racial factors and when you read into the idea, you soon see that a lot of it actually makes good sense. Why is this such an important aspect of how you might always find it nearly impossible to shed a few pounds, while on the other hand other people seem to easily lose weight?

Without going into too much detail here, as it would take a whole book to explain it all (and a whole book or several has been written already), the gist of this particular diet is that we should eat certain foods according to our ancestral dietary needs and the correlation with the evolution of the different major blood groups (O, A and B).

Type O

Blood type O is the oldest and most common type and this correlates with our most ancient ancestors who were hunter-gatherers. Their primary dietary staple was meat that the tribal hunters would bring back to the tribe to sustain them.

There was little in the way of vegetables or grain based foods in their diet because they hadn't gotten around to farming yet. They lived on meat, some fruit and berries and not very much else besides.

Hence, modern "O" types generally thrive on more meat based meals with fewer vegetables, pulses or grains. Of course, this is a gross over-generalization and more detailed reading is needed to get a better understanding of what you should and should not eat. But the basics are that certain types of food are more easily metabolized by people with certain blood types.

Type A

Blood type A came along when our ancestors had become farmers and became less reliant on catching and killing animals for food. So less emphasis is placed on eating meat and more on eating vegetables, fruits, nuts and berries.

People in this group are well suited to being vegetarian thanks to the lesser reliance on animal products.

Type B

Blood type B being the most recent evolved group, people with this group are generally better at metabolizing grains and pulses than meats. They can also metabolize dairy produce better than older groups which makes them best able to cope with modern processed foods.

How it Works

The diet is based on the way that certain lecithins in foods react with the digestive systems of people with different blood groups. Some react in a positive way and some in a negative way, depending on your blood group.

It's worth reading into this especially if you are one of those people who have always found dieting a real chore or had problems losing weight with certain diets. This diet is also interesting for people who suffer with certain medical conditions.

The old saying that "we are what we eat" is fundamentally true, especially when you realize that if you are eating too much of a certain food and your blood type dictates that it is wrong for your body, simply removing that food could bring about relief from the condition. I'd say that in itself makes it well worth looking into this way of eating.

Resources:, and www.vanderbilt.ed.