Best Food To Be Eaten By Different Bood Groups

March 09, 2021

The Blood Type Diet: An Evidence-Based Review

Written by Joe Leech, MS on June 4, 2017

A diet called The Blood Type Diet has been popular for almost two decades now.


Proponents of this diet suggest that your blood type determines which foods are best for your health.


There are many people who swear by this diet, and claim that it has saved their lives.


But what are the details of the blood type diet, and is it based on any solid evidence?


Let’s have a look.



What is The Blood Type Diet?

The blood type diet, also known as the blood group diet, was popularized by a naturopathic physician called Dr. Peter D’Adamo in the year 1996.


His book, Eat Right 4 Your Type, was incredibly successful. It was a New York Times bestseller, sold millions of copies, and is still wildly popular today.


In this book, he claims that the optimal diet for any one individual depends on the person’s ABO blood type.


He claims that each blood type represents genetic traits of our ancestors, including which diet they evolved to thrive on.


This is how each blood type is supposed to eat:


Type A: Called the agrarian, or cultivator. People who are type A should eat a diet rich in plants, and completely free of “toxic” red meat. This closely resembles a vegetarian diet.

Type B: Called the nomad. These people can eat plants and most meats (except chicken and pork), and can also eat some dairy. However, they should avoid wheat, corn, lentils, tomatoes and a few other foods.

Type AB: Called the enigma. Described as a mix between types A and B. Foods to eat include seafood, tofu, dairy, beans and grains. They should avoid kidney beans, corn, beef and chicken.

Type O: Called the hunter. This is a high-protein diet based largely on meat, fish, poultry, certain fruits and vegetables, but limited in grains, legumes and dairy. It closely resembles the paleo diet.

For the record, I think any of these dietary patterns would be an improvement for most people, no matter what their blood type is.


All 4 diets (or “ways of eating”) are mostly based on real, healthy foods, and a huge step up from the standard Western diet of processed junk food.


So, even if you go on one of these diets and your health improves, it doesn’t necessarily mean that it had anything to do with your blood type.


Maybe the reason for the health benefits is simply that you’re eating healthier food than before.



The type A diet resembles a vegetarian diet, but type O is a high-protein diet that resembles the paleo diet. The other two are somewhere in between.



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Lectins are a Proposed Link Between Diet and Blood Type

One of the central theories of the blood type diet has to do with proteins called lectins.


Lectins are a diverse family of proteins that can bind sugar molecules.

These substances are considered to be antinutrients, and may have negative effects on the lining of the gut (1Trusted Source).


According to the blood type diet theory, there are many lectins in the diet that specifically target different ABO blood types.


It is claimed that eating the wrong types of lectins could lead to agglutination (clumping together) of red blood cells.


There is actually evidence that a small percentage of lectins in raw, uncooked legumes, can have agglutinating activity specific to a certain blood type.


For example, raw lima beans may interact only with the red blood cells in people with blood type A (2).


Overall, however, it appears that the majority of agglutinating lectins react with all ABO blood types (3Trusted Source).


In other words, lectins in the diet are NOT blood-type specific, with the exception of a few varieties of raw legumes.


This may not even have any real-world relevance, because most legumes are soaked and/or cooked before consumption, which destroys the harmful lectins (4Trusted Source, 5Trusted Source).



Some foods contain lectins that may cause red blood cells to clump together. Most lectins are not blood type specific.



Is There Any Scientific Evidence Behind The Blood Type Diet?

Research on ABO blood types has advanced rapidly in the past few years and decades.


There is now strong evidence that people with certain blood types can have a higher or lower risk of some diseases (6Trusted Source).


For example, type Os have a lower risk of heart disease, but a higher risk of stomach ulcers (7, 8Trusted Source).


However, there are no studies showing this to have anything to do with diet.


In a large observational study of 1,455 young adults, eating a type A diet (lots of fruits and vegetables) was associated with better health markers. But this effect was seen in everyone following the type A diet, not just individuals with type A blood (9Trusted Source).


In a major 2013 review study where researchers examined the data from over a thousand studies, they did not find a single well-designed study looking at the health effects of the blood type diet (10Trusted Source).


They concluded: “No evidence currently exists to validate the purported health benefits of blood type diets.”


Of the 4 studies identified that somewhat related to ABO blood type diets, they were all poorly designed (11Trusted Source, 12Trusted Source, 13).


One of the studies that found a relationship between blood types and food allergies actually contradicted the blood type diet’s recommendations (13).



Not a single well designed study has been conducted to either confirm or refute the benefits of the blood type diet.


Take Home Message

I do not doubt that many people have experienced positive results by following the diet. However, this does NOT mean that this was in any way related to their blood type.


Different diets work for different people. Some people do well with a lot of plants and little meat (like the type A diet), while others thrive eating plenty of high-protein animal foods (like the type O diet).


If you got great results on the blood type diet, then perhaps you simply found a diet that happens to be appropriate for your metabolism. It may not have had anything to do with your blood type.


Also, this diet removes the majority of unhealthy processed foods from people’s diets.


Perhaps that is the single biggest reason that it works, without any regard to the different blood types.


That being said, if you went on the blood type diet and it works for you, then by all means keep doing it and don’t let this article dishearten you.


If your current diet ain’t broken, don’t fix it.


From a scientific standpoint, however, the amount of evidence supporting the blood type diet is particularly underwhelming.



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Can the Keto Diet Help Prevent Migraine Attacks?

Written by Gavin Van De Walle, MS, RD on May 27, 2020 — Medically reviewed by Katherine Marengo LDN, R.D.

Keto & migraine


Cautious optimism

Bottom line

The ketogenic, or keto, diet is a diet rich in fats, moderate in protein, and very low in carbs.


It has long been used to treat epilepsy, a brain disorder that causes seizures.


Owing to its therapeutic effects in managing epilepsy, the keto diet has been suggested to alleviate or prevent other brain disorders like migraine.


This article examines the evidence to determine whether the keto diet can help prevent migraine.



The keto diet and migraine

Keto refers to a diet that consists primarily of fats with very few carbs — usually less than 50 grams daily (1Trusted Source, 2Trusted Source).


For reference, the average American adult consumes 200–350 grams of carbs daily (2Trusted Source).


Carbs are found in a variety of foods, such as fruits, breads, cereals, pasta, milk and other dairy products, as well as starchy vegetables like potatoes and corn.


Normally, your body breaks down carbs from these foods into glucose to supply your cells with energy.


Yet, when you severely restrict carbs from your diet for 3–4 days, your body must look for alternative fuel sources to meet its energy needs (1Trusted Source).


It does so by breaking down fats in your liver to produce ketones, which your body and brain can easily use for energy.


Your body enters a metabolic state called ketosis when blood ketone levels rise above normal.


It has been suggested that these ketones have protective effects against migraine (3Trusted Source).


Migraine is characterized by headaches that cause severe throbbing or pulsing pain, usually on one side of your head (4Trusted Source).


This pain may be accompanied by other symptoms, such as nausea and sensitivity to light or sound.


While the exact mechanism remains unclear, it’s thought that the ketones produced while on a keto diet restore brain excitability and energy metabolism to counteract brain inflammation in people with migraine (5Trusted Source, 6Trusted Source, 7Trusted Source, 8Trusted Source).



Consuming a low number of carbs on a keto diet forces your body to shift its metabolism from using carbs as fuel to using ketones. These ketones have been suggested to alleviate migraine.


Ketones may protect against migraine attacks

Early research has suggested that the keto diet may be beneficial for preventing or treating migraine.


The first report dates back to 1928, when medical literature reported that 39% of people experienced some improvement in migraine frequency and severity with the keto diet (9Trusted Source).


A later study in 1930 demonstrated that 28% of people with migraine who followed a keto diet experienced no migraine attacks for up to 3 months after entering ketosis, with another 25% reporting less severe or less frequent migraine attacks (10Trusted Source).


However, since these reports, interest in the keto diet for migraine steadily declined, likely related to the diet’s strict nature and the development of over-the-counter and prescription medications for managing the condition.


Interest was later renewed when a 2015 observational study found that migraine frequency was significantly reduced in women who followed a low calorie keto diet for 1 month, compared with a standard low calorie diet (11Trusted Source).


Still, compared with the standard diet, women who followed the keto diet lost significantly more weight, suggesting that the reduction in migraine frequency may also be linked to weight loss rather than the keto diet itself.


To determine whether weight loss is linked to a decrease in migraine attack frequency, researchers performed a follow-up study.


The study noted that participants with migraine experienced an average of three fewer attacks per month while on a very low calorie keto diet, compared with a very low calorie non-keto diet, despite similar weight loss between the diets (12Trusted Source).


Strengthening these findings, another study observed significant reductions in migraine frequency, duration, and severity after a 1-month keto diet (8Trusted Source).


Collectively, these results suggest that the keto diet may treat migraine but not prevent the condition entirely.



Studies have demonstrated that the keto diet may help reduce migraine frequency, duration, and severity.




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The jury is still out

The current evidence suggests that a keto diet can help reduce migraine frequency, duration, or severity.


However, there’s still much to be learned about the keto diet before it can be routinely recommended as a primary or supplementary treatment option for people with migraine.


For example, it’s unknown whether a state of ketosis must be maintained continuously or only some of the time to experience its protective effects against migraine.


Moreover, all of the studies showing the beneficial effects of the keto diet on migraine were performed in adults who had overweight or obesity based on their body mass index (BMI).


Therefore, it’s unknown whether adults with a BMI in the “normal” range would experience the same benefits.


Most of the studies were also performed by the same group of researchers in the same geographical location and setting, which could bias the results and limit the generalizability of the findings to other populations.


Aside from these study weaknesses, the keto diet can be difficult to follow long term and cause changes to bowel habits. Plus, it may be contraindicated in people with certain liver conditions, such as pancreatitis, liver failure, and fat-metabolism-related disorders (2Trusted Source, 13Trusted Source).


Interestingly, a study is underway to determine whether ketone supplements prevent migraine (14Trusted Source).


Exogenous ketone supplements are produced synthetically but have been shown to increase blood ketone levels, mimicking what happens when you follow a keto diet (15Trusted Source, 16Trusted Source).


That said, ketone supplements may be an alternative to following a keto diet for managing migraine attacks.


Still, additional studies are needed to confirm the keto diet’s ability to manage migraine.



While the keto diet may be a promising treatment option for migraine, additional studies are needed.


The bottom line

The keto diet is a diet that shifts your metabolism from burning carbs to ketones for fuel.


These ketones may have protective effects against migraine, a brain disorder that causes throbbing head pain.


While promising, additional studies are needed to determine the efficacy of the keto diet for managing migraine.

Mar 10, 2021 at 12:24 AM
nice info
May 17, 2021 at 10:14 AM
Oct 05, 2022 at 01:56 AM
Thanks for the info