Choosing foods on the basis of your blood group may lead to weight loss and improved health, says the founder of the Blood Group Diet. But does science back this claim? 

The idea of ‘you eat what you are’ may seem far-fetched, but this really is the basis of the blood group diet. Eating for your own blood type is the fundamental of the Blood Group diet, which mandates that you base your meal plan on your blood group.

Eating plan based on evolution

When we eat food that suits us, we metabolize it easier, says the founder Dr Peter D’Adamo. So, he bases his dietary recommendations, on foods that were consumed at the time a specific blood type evolved.

Since the oldest Type O, emerged during the time of the hunter gatherers, people with O blood type must eat foods of this era. On the other hand, Type A emerged in the agrarian era, so those with this blood group are supposed to opt for mostly vegetarian foods.

Every person who decides to choose this diet plan is supposed to determine the right balance for themselves, based on a categorization devised by D’Adamo for each blood type: highly beneficial, the neutral, and items to avoid.

Not backed by science

The plans are generally healthy, and junk food doesn’t feature in them. But there’s no scientific evidence to support the idea that eating foods based on your blood type guarantees weight loss. However, experts say that the foods suggested in the individual diets are basically healthy.
Type O

High protein low carbohydrate diet, replete with meat, chicken, vegetables and fruit. This plan forbids grains, nuts, or dairy products. Some drawbacks are the low fibre, calcium, iron and vitamins D and E content. In addition, it is high in cholesterol.

Vigorous daily exercise is recommended to those with blood group O.

Type A

Mostly vegetarian diet, high in carbohydrates and low in fat. No dairy products and meats are allowed, so the diet has the lowest number of calories in a day( under 1200).

Gentle exercises like yoga and golf are recommended, and daily meditation is also beneficial to those with this blood type.

Type AB

Mostly vegetarian diet, with occasional portions of fish, meat and dairy. But the drawbacks of this diet chart are that the foods are low in fibre, folate, vitamin E, calcium, magnesium and zinc.

Type B

If you are type B, you can eat fruit, vegetables, grains, fish, and dairy products. Chicken is off the list, though this plan has the highest number of calories a day (roughly 1750). The low vitamin E and iron content of foods in this group, are a disadvantage.

Moderate exercise such as swimming and walking are recommended.