If you fall in Blood Group O, avoid these habits and you will live longer

The blood type diet became popular through a book by Dr. Peter D’Adamo, a naturopath. He believes that people should eat and exercise based on their blood type to stay healthy and avoid illness. But doctors and scientists say this idea has no solid proof.

What is the Blood Type Diet?

D’Adamo says your blood type tells you what foods your ancestors ate. So, eating like them will make you healthier. For example, he says:

People with type O blood should eat lots of protein, especially lean meats and fish.

They should also eat vegetables, fruits, and use olive oil.

He recommends avoiding wheat, corn, dairy, legumes, caffeine, and alcohol.

He also suggests type O people do strong aerobic exercises.

He says type O is the oldest blood type and belonged to hunter-gatherers. But scientists say this is not true. Some even believe type A is the oldest blood type.

D’Adamo also links type O blood to problems like digestive issues, insulin resistance, and poor thyroid function—but there’s no scientific proof for these claims.

What Are the Different Blood Types?

There are four main blood types:

A

B

AB

O

There’s also something called the Rh factor, which makes blood either positive or negative (like O+ or O-). But the blood type diet doesn’t consider Rh at all.

Does This Diet Actually Work?

No. Many studies have found no proof that eating based on your blood type improves your health.

A 2013 review of 16 studies found no evidence to support blood type diets.

A 2014 study showed the diet helped with some health markers like lower fat levels in the blood—but that had nothing to do with blood type.

Any benefits likely come from the fact that the diet promotes healthy foods and regular exercise—not from matching your meals to your blood type.

Are There Real Health Risks?

Even though eating healthy foods and exercising are good for everyone, the blood type diet can still have downsides:

Type O diet recommends high meat intake, which might not be good for your heart or kidneys.

If you follow this diet without a doctor’s advice, it could harm your health.

Your blood type doesn’t tell you everything about your health. Other factors like genetics, lifestyle, and existing conditions matter too.

Final Thoughts

There’s no scientific proof that your blood type should decide what you eat.

If you want to eat healthier or lose weight, talk to a doctor or dietitian. They can help you create a plan that fits your needs—not just your blood type.