Is Your Blood Type Making You Unable To Lose Fat?

A client of mine posted a photo in our group about the blood type diet. Apparently, a PT at her local gym had shared it and she was curious to hear our opinion about it.

Funnily enough, I had received a newsletter from Harvard Medical School just a week earlier discussing this diet.

What is the blood type diet?

This diet was developed by Peter D’Adamo who published a book called Eat Right 4 Your Type in 1996.

The blood type diet aims at helping people become healthier, live longer, and achieve their ideal weight by eating according to their blood type.

Is there any evidence to support the diet?

Although the book was released in 1996 there are no high-quality studies about the blood type diet that have been published supporting it. One study in 2014 did find improvements in some cardiometabolic risk factors, but these improvements were not related to the participant's blood type.

So why are people still promoting this diet?

Although there’s no evidence that the diet works, there are people who swear by it, as they’ve seen some amazing results following it. But as we know, any diet will results in weight loss as long as there is a calorie reduction. But it doesn’t mean that you need to cut out foods that you love or enjoy in order to achieve these results.

So what’s the problem then?

The problem is that anecdotal evidence seems to ‘win’ over common sense and diets with scientific support. And what’s even worse is that ‘fitness professionals’ are promoting these type of fad diets.

In addition, cutting out whole food groups put you at greater risk of nutrient deficiency and to develop an eating disorder.

So anytime a person is recommending a ‘diet’ make sure that you think critically.

- Is the diet scientifically sound?

In this case, there is no proven connection between blood type and digestion or fat loss.

- Does the diet exclude particular foods or entire food groups?

In this case, depending on your blood type you should avoid certain foods and food groups. (I wouldn’t want to prepare food for a family with different blood types… yikes!!!)

- Does the diet support social health?

In this case, it would be harder to maintain good social health due to all the restrictions.

- Does the diet support physiological health?

In this case, restricting the types of food/food groups may lead to an ‘unbalanced’ nutrient intake.

- Does the diet support psychological health?

Restrictive diets have been associated with a higher rate of developing eating disorders. Adopting a flexible approach is far better for psychological health.

So no, your blood type is not making you unable to lose fat!


Diet Smart. Not Hard.

Coach: Inger