How to Manage a Blood Type O Diet

By: Michael Lam, MD, MPH


Blood type O diets require a lot of proteinType Os thrive on intense physical exercise and animal protein. Unlike the other blood types, Type Os muscle tissue should be slightly on the acid side. Type Os can efficiently digest and metabolize meat because they tend to have high stomach-acid content. The success of the Type O Diet depends on the use of lean, chemical-free meats, poultry, and fish. Consuming these kinds of high quality animal proteins ensures the smooth functioning of the body without undue metabolic stress. This is important since metabolic processes make up fully half of the functional circuits of the NeuroEndoMetabolic (NEM) stress response, and maintaining smooth functioning of the NEM systems is critical to good and stable health.
Type Os don’t find dairy products and grains quite as user friendly as do most of the other blood types.

Let's find out if you have Adrenal FatigueLet's find out if you have Adrenal Fatigue

Blood type Os do best with a high amount of proteinThe initial weight loss on the Type O Diet is by restricting consumption of grains, breads, legumes, and beans. The leading factor in metabolic dysregulation leading to  weight gain for Type Os is the gluten found in wheat germ and whole wheat products, which interferes with insulin efficiency and slow down metabolic rate. This slowdown has a knock on effect throughout many systems in the body, including other circuits of the NEM stress response system.

Another factor that contribute to weight gain is certain beans and legumes (lentils and kidney beans) contain lectins that deposit in the muscle tissues making them less “charged” for physical activity. This puts a crimp in the metabolic readiness of the body with regard to physical exertion, which can result in extra stress on the body and muscles when exercising.

The third factor in Type O weight gain is that Type Os have a tendency to have low levels of thyroid hormone or unstable thyroid functions, which also cause metabolic problems. Therefore it is good to avoid food that inhibits thyroid hormone (cabbage, brussels sprouts, cauliflower, mustard green) but increase hormone production (kelp, seafood, iodized salt).

Several classes of vegetables can cause big problems for Type Os, such as the Brassica family (cabbage, cauliflower, etc.) can inhibit the thyroid function. Eat more vegetables that are high in vitamin K, which helps the clotting factor which is weak in Type Os. The nightshade vegetables can cause lectin deposit in the tissue surrounding the joints.

Because of the high acidity stomach, Type Os should eat fruits of alkaline nature such as berries and plums..

Your diet requires protein, stay balanced for blood type OType Os should severely restrict the use of dairy products. Their system is not designed for the proper metabolism. If you are a Type O of African ancestry, you should eliminate dairy foods and eggs altogether.

The physiological characteristics individuals with blood type O are predisposed and how their bodies deal handle different kinds of diets is also tied to how their bodies handle stress. The body’s stress response is governed by the neuroendometabolic (NEM) stress response system, made up of multiple neuroendocrine and metabolic circuits, functional systems that mitigate and minimize the effect of stressors on the function of different organs and areas of the body. These circuits all work together to ensure the body’s continued function is not in question every time a stressful occurrence or event arises.

The archetypical blood type O physiology tends to have engender fragility in some components of the metabolic circuits of the NEM stress response. Accordingly, metabolic symptoms will likely arise first when the stress response system becomes disrupted or dysregulated such as weight gain and reduced exercise capacity. The first line of defense against such symptoms is first to adopt lifestyle practices to minimize stress and promote relaxation. On top of this, proper nutrition is another pillar critical to maintain proper metabolic health and a healthy body in general.

Blood Type O Details

See Detailed Type O Food Chart
A comprehesive list of what foods to eat on a diet for blood type O


Dr. Lam’s Key Questions

Cabbage is a goitrogenic food that contains a substance that can slow down hormonal production in the thyroid.

This diet is based on a certain protein found in all foods, called lectin, and how this lectin reacts to the blood that is specific for each blood type.

DrLam.com
5 -
Hello, I am not writing with a specific question. I am actually an Anatomy Instructor at one of our nation's most prestigious medical institutions, and I wanted to write and let you know that I truly have found your recommendations effective for me personally. I am a type O, and through the years of trial and error with various food regimens, I came to find out on my own many years ago that certain food groups tended to make me feel healthy and 'alive' and other food groups seemed problematic. On my own, I have gradually eliminated most wheat products and dairy and have gravitated to meat and seafood. I was stunned when I read your research because it so nearly perfectly matched my own, albeit non-scientific conclusions about what works for me. I am a healthy, vibrant 46 year old woman in excellent physical condition, take no medications for hypertension or cholesterol. I am five feet seven inches and weigh about 118 lbs- I am fit and lean. I do tend to gravitate to large amounts of physical exercise. Your research is quite fascinating. I am a testimonial to your work! Thank you.




77 Comments

  • Pavi says:

    Hello i am pavi and i am rheumatoid artheritis patient. I do understand the various diet to consume or to not but my one concerned is that i am vegetarian and can u please suggest me what should i need to take as a diet..please do reply…thank you.

  • rosemary pozzi says:

    what is good for type o to have for a diet

  • chris l says:

    I’ve just found out i’m an O+. I train with weights 4 times a week and for the past 20 years or so had actually been eating like an O with no knowledge of what blood group I was. However, for that time I’ve constantly been bloated and had like a ‘dome effect’ stomach, felt bloated a lot of the time and looked “watery and fat.” my mother is an A and convinced I maybe the same started eating like an A -I felt much less bloated, looked and felt so much better. I’d like to think there is something in this diet but i’m not convinced enough to go by it 100%. I’ve lost no muscle mass in the meantime.

    • Dorine Lam RDN says:

      As a person ages, the body’s organs functions also reduced. Less digestive enzymes to help digest the food. You may want to take some digestive enzymes and see if that helps, and switching to less heavy meats (poultry and fish) a few times a week would help.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Maerie says:

    I’m O-negative. I like what I’m reading here, but admit that I actually have never been one to enjoy exercise at all. My body has never ‘craved” exercise. I do enjoy yoga 3 times a week…but it’s not heavy duty exercise. I have tried to push myself (joined gyms, classes – hated it!) I also find that eating beef slows me down & constipatiion is an issue when I eat it. Am I supposed to ignore how I feel & just go at this diet or does being O negative change the diet in any way? I really want to lose the weight &have more energy.

    • Dorine Lam RDN says:

      Always listen to your body. Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination. The blood type diet is fitting for most of the people. Due to tremendous variation in the individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Fahmy Omar says:

    Hi,
    I have been suffering from a severe Hidradenitis Suppurativa for the last 20 years, and I have tried every possible medical treatment icd including surgery and skin grafting do think it could be related to the diet?

  • Leo Molina says:

    Should I avoid all types of beans and legumes. I don’t eat meat or pork, occasionally chicken.

    • Dorine Lam RDN says:

      For Type O, you are supposed to be on a high protein diet. It will be very difficult for you to follow this diet if you are not eating eggs, fish, or dairy products at all. The best source of protein for you would be the allowed nuts, seeds, and legumes. Cut down on products that are made from grains and take only those allowed.

      Many of the beans are alright to eat occasionally. Azuki and pinto beans are beneficial.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Jay says:

    I’m and I’m no scientist…and have been on a strict lifestyle based on this very same restrictive food restrictions and thanks to it I’m no longer diabetic and virtually pain free… I feel 200% better than in my whole fifty three years! 5’6 140. Was 200 lbs. No processed food…no dairy! No bread!

  • Marcus says:

    Hello Dr. Lam.
    I have been following a high fat (ketogenic) diet for a year or so. It has led me to drop about 30 pounds. I follow this diet for bodybuilding competitions, and a big portion of it calls for eggs as they help me to reach the high fat/protein numbers that I need.
    What should I do, if I’m O positive and African American?
    Thank you

    • Dorine Lam RDN says:

      Eggs are to be eaten occasionally for Blood Type O. You may want to use some protein powder and increase your meat or fish intake to get the balance you need. Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination.The blood type diet is fitting for most of people. Due to tremendous variation in an individual’s constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Diana Muirhead says:

    Hi Dr Lam,

    I have been so confused for the last few years in trying to understand what to take out of my diet as my health has been feeling fragile the last few years.
    I have just identified I am a Type O positive as a friend mentioned this diet.
    I have recently had a colonoscopy which identified I have ulcers in my bowel and I also have had a scan to show I have mulitiple nodules on myright side of thyroid. Both these you mention as problems with the 0 Positive type. I am looking forward to seeing the results of this diet. Thank you. from Diana

  • Jarret Altland says:

    Hello Dr. Lam,

    I am curious as to if there is any correlation between people with Blood type O (negative to be specific) and metal allergies. Has anyone done any studies on this?

    • Dorine Lam RDN says:

      I don’t know the answer to your question.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Georgie Scibetta says:

    Dr. Lam,
    I’m interested in starting the blood type O diet. I recently took out flour, wheat, processed sugar from my diet. I went through a month long diet, supplementing 2 meals with protein shakes mixed with greens and berries. I lost some weight, albeit I didn’t start the diet for that reason. I was trying to determine what has been causing the allergic reactions I get after most meals. Reaction’s include: sneezing, coughing, runny nose, itchy eyes. Sometimes I get all these symptoms, sometimes I get lucky and only get a few. Im also allergic to most antibiotics and certain beer and wine. I recently had a panel done for blood work. It shows I have low functioning kidneys. My doctor says its nothing to be alarmed about, but I have a suspicion that my diet and all the allergies have taken a toll on my organs. With just 4 weeks on the diet my cholesterol dropped to almost normal range. Im hoping that with this new O type diet I can get my body functioning the way it should. I’m so glad I stumbled upon your website. I’m a healthy thriving and active 40 something year old and I intend to extend my career. Thank you for the info!

    • Dr.Lam says:

      Glad you enjoy the education. Good luck to you!

      Dr Lam

    • Jay says:

      I’m type O- and doctor A’damo started this for me by his research on eat right for your blood type! He said no alcohol for O blood…none! Love corona beer, but none!

      • Dorine Lam RDN says:

        Unfortunately, beer is to be avoided for blood type O.
        White or red wine is neutral for blood type O.

        Dorine Lam, RDN, MS, MPH
        Registered Dietitian and Senior Holistic Nutritionist

  • Alisha says:

    I am so happy to have found this, it was like reading all about me! VITAL info about “foods not allowed” some of which i bought just today thinking I was being healthy…. they are but apparently not for me! Looking forward to making these changes and seeing what happens!

  • Mawuena says:

    Hello I am o- and 29 years weighing 39. Please what is the best sugestion you can give me regrading my diet and how to gain healthy weight.
    Thanks

    • Dorine Lam RDN says:

      Following the blood type O diet may reduce inflammation in your body and rebalance you internally. When your body is more balanced, it maybe easier to gain weight.

      Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination.The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      To gain weight means your intake is more than your output. Consume good beneficial oil with your food – such as extra virgin olive oil. Increase meat in the allowed intake would be beneficial. Nuts and seeds are also high in calories. Coconut and avocado are high in calories also.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Paola says:

    I’m curious what you would recommend for O positive blood types who want to go more plant based. I’ve been eating lots of legumes and wondering if that’s not the best fit for me.

    • Dorine Lam RDN says:

      For Type O, you are supposed to be on high protein diet. It will be very difficult for you to follow this diet if you are not eating eggs or fish or dairy products at all. Best source of protein for you would be the allowed nuts, seeds and legumes. Cut down on products that are made from grains, take only those allowed.

      Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination. The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Morgan W says:

    So reading all this it mentions following the blood type o diet if you are type o can help you lose/regulate your weight and energy etc. But I have had problems gaining weight for years, (I’m an 18 year old female, 5’4 in height and I have weigh 98-100 pounds since middle school). Would eating right for my type o blood type help me get to a healthier weight? Supposedly I’m supposed to be around 115-130 pounds.

    • Dorine Lam RDN says:

      It is possible when you are eating the right food.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Danielle Marie says:

    If a protein base is paramount to this diet, what is the explanation for eggs to be avoided completely? I have lost 28 lbs in a 2 month period following eating in accordance to my blood type. I am O Negative and I happen to love eggs. They don’t appear to have any negative effects on my digestion, energy, or general physical self. I am simply seeking some more clarification pertaining to why eggs are recommended to be avoided. Thank you for your time and consideration.

    • Dorine Lam RDN says:

      This diet is based on a certain protein found in all foods call lectin, and how this lectin reacts to the blood that are specific for each blood type.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • L. Carter says:

    I found this information very resourceful. In this article you mention it is good to avoid foods such as cabbage and brussels sprouts and eat more vegetable that are hing in vitamin k. I looked up vitamin K vegetables and found that both cabbage and brussels sprouts are in the top 10 list, did I misunderstand?

    Thank you

    • Dorine Lam RDN says:

      This is two different health issues that we are talking about, cruciferous vegetables are not good for the thyroid, if you have thyroid issues. But if you have problems clotting, then you need to eat more of these veggies or non cruciferous green leafy veggies for the vit K.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Pat Kaganda says:

    It was interesting to me that Ezekiel Bread is acceptable to eat for Type O. I can’t eat wheat, and I noticed it does have wheat gluten in it. Does that still meet the criteria for wheat free? Is the gluten something new that has been added to Ezekiel bread?

    • Dorine Lam RDN says:

      It is not the gluten, but the lectin in each food that affects the blood type.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

    • Jay says:

      I thought that same bread was okay…ate it one time and check my sugar? Shot up to 400! No bread!

  • Habiba chime says:

    Is brags apple cider vinegar and coconut oil good for blood type o.

    • Dorine Lam RDN says:

      I don’t have information on Apple Cider Vinegar for Blood Type O. Coconut Oil is to be avoided.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

      • Mandy says:

        I would like to know why coconut oil has to be avoided for blood type O? What will it affect if I have some of coconut oil?

  • Joe norton says:

    I myself have found this information correct I love physical activity and always avoid fatty foods, but I also learned far more about my blood type

  • Sal says:

    Dear Dr Lam

    I am a real newcomer to this, having picked up the Blood group diet book. I am a little at sea at the moment – but have one Big PROBLEM – I am type O+ blood but a vegetarian since I was 15! Help!
    Thanks x

    • Dorine Lam RDN says:

      For Type O, you are supposed to be on a high protein diet. It will be very difficult for you to follow this diet if you are not eating eggs, fish, or dairy products at all. The best source of protein for you would be the allowed nuts, seeds and legumes. Cut down on products that are made from grains, take only those allowed.

      Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination. The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Also follow the following as a guide:Blood Type O

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Brenda says:

    I am African American and noticed it said the those of African descent should avoid eggs all together. That’s discouraging because I like to eat two boiled eggs in the morning. Can you tell me more about this?

    • Dorine Lam RDN says:

      You have some very good valid questions. Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination. The diet is founded by Dr Peter D’adamo. There are some principles in the blood type diet that are not accepted in conventional medicine and their recommendations. Ie coconut and soy are some of these discrepancies.

      Blood Type O’s breakfast includes allowed meat and the allowed fruits; Ezekiel bread with nut butter and allowed fruits; Allowed cereal (hot or cold) with almond milk, nuts and allowed fruits.

      Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination. The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

      • Dellesa Kirk-Johnson says:

        Good day, I am O positive and once I followed the Blood type diet for two weeks before my vacation and noticed a big difference. I slept better, lost 10 pounds and skin was glowing. I of course fell of the wagon but need to get back on track. It really works!

    • Dorine Lam RDN says:

      Blood Type O’s breakfast includes allowed meat and the allowed fruits; Ezekiel bread with nut butter and allowed fruits; Allowed cereal (hot or cold) with almond milk, nuts and allowed fruits.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • iti singh says:

    I am vegetarian and I am 32.which protein I can take for my wellbeing. should I eat rice in place of chapatti

  • Soumya says:

    Hi i am o+ and a vegetarian
    What diet chart should i follow for weight loss

  • Selamawit says:

    I am blood type blood type o pluse what should I eat to increases my weight

    • Dorine Lam RDN says:

      To gain weight means your intake is more than your output. Consume good beneficial oil with your food – such as extra virgin olive oil. Increase meat in the allowed intake would be beneficial. Nuts and seeds are also high in calories. Coconut and avocado are high in calories also.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Pum says:

    I have broken out over the last several months with severe ring worms and itchy skin. Is it possible that this is due to a food sensitivity?

    • Dr.Lam says:

      Highly unlikely on the worm. Itchy skin can be from many sources. and food sensitivity is possible. You need to check with your doctor.

      Dr Lam

  • Ashish Baj says:

    Hi. I am an O+ and a vegetarian. What can be the key components of my diet if there is no meat?

    • Dorine Lam RDN says:

      For Type O, you are supposed to be on high protein diet. It will be very difficult for you to follow this diet if you are not eating eggs or fish or dairy products at all. Best source of protein for you would be the allowed nuts, seeds and legumes. Cut down on products that are made from grains, take only those allowed.

      The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Dorine Lam, RDN , MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • John McCArthy says:

    Good morning,
    I am type O, and a big meat eater. Love meat. makes me very happy and content. But I also enjoy eating eggs for breakfast. I did stop all wheat products several months ago, before I read your article, and have lost 10 pounds. But if I follow your chart, I have no breakfast alternatives. Any suggestions?
    thanks, John

    • Dorine Lam RDN says:

      Blood Type O’s breakfast includes sausages or bacons and the allowed fruits; Ezekiel bread with nut butter and allowed fruits; Allowed cereal (hot or cold) with almond milk, nuts and allowed fruits.
      Dorine Lam, RDN , MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

      • trina says:

        This is confusing . I read no pork and grains so how is sausage,bacon and cereal on the breakfast list for type o?

        • Dorine Lam RDN says:

          Blood Type O’s breakfast includes meat allowed and the allowed fruits; Ezekiel bread with nut butter and allowed fruits; Allowed cereal (hot or cold) with almond milk, nuts and allowed fruits.
          Dorine Lam, RDN, MS, MPH
          Registered Dietitian and Senior Holistic Nutritionist

  • vladimir says:

    NO eggs , no diary, my low budget , red meat expensive, how to stay alive then? Blood type O requires plenty of physical activity, like weightlifting, i need some protein then, cant afford eating meat 3x / day , im not eating gmo soy or any soy, mass produced beef, dont have money for ezekiel bread, amaranth,quinoa…
    My breakfast everyday is 4-5 fried whole eggs on lard, drinking 1 liter of organic cow milk(cows living on mountain plaine on fresh air), im O+ , healthy doing weighlifting 3 times per week

    • Dorine Lam RDN says:

      You have some very good valid observations. Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination. The diet is founded by Dr Peter D’adamo. There are some principles in the blood type diet that are not accepted in conventional medicine and their recommendations. Ie coconut and soy are some of these discrepancies.

      You can also use chicken and turkey for meat also.

      The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Dorine Lam, RDN , MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Jeffrey Mitchell says:

    I am O rh neg and am also type 2 diabetic. My diabetes is well controlled but I do carry a bit of a male ‘beer belly’ though I only drink alcohol rarely. But and its a big but I am a bit of a teapot and drink as much as 10 + cups of tea a day with milk and sweetener (aspartemine) I am tall 6′ 2 with a large , for a male; ,frame. Other than the weight around the middle I am not fat but weigh 18 1/2 stone. I have avoided red meats for quite a few years eating mainly chicken and pork and lots of veg. Is this my misconception that red meat is bad for me should I switch to mainly a protein diet?

    • Dorine Lam RDN says:

      For blood type O, red meats are beneficial and may help you improve your bellie. Drinking 10 cups of tea a day is quite a bit, it is harder to lose weight when you take sweetener (aspartame) even though they are no calories. For blood type O – most important to avoid the following foods to lose weight: wheat (wheat and white flour products), corn, kidney beans, navy beans, lentils, cabbage, Brussels sprouts, cauliflower and mustard green.

      The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Also follow the following as a guide:Blood Type O, Metabolic Syndrome

      Dorine Lam, RDN , MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Jess says:

    I am Type O and I read that I can have dairy no more than 3 times a week, is that accurate? I use yogurt as a snack or as an alternative to sour cream and I was hoping I could still use it occasionally.

  • marcia says:

    I have been pretty regimental about what i have been eating for my blood type O for the past 2 weeks, i dont seem to be losing weight and have alot of flatulence, is this just a detox or am i doing something wrong

    • Dorine Lam RDN says:

      For blood type O – most important to avoid the following foods to lose weight: wheat (wheat and white flour products), corn, kidney beans, navy beans, lentils, cabbage, Brussels sprouts, cauliflower and mustard green.

      The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Also follow the following as a guide:Blood Type O, Metabolic Syndrome

      Flatulence may happen if the diet is very different from what you used to be eating. You may want to take some digestive enzymes to help you digest your food better. You can find some good ones from http://www.supplementclinic.com.

      Dorine Lam, RDN , MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Mary says:

    Was wondering / hoping fresh salmon as opposed to smoked salmon is ok for blood type o+. Also in regards to eggs, should they be eliminated completely? I find thet give me a great source of energy and tide me over to the next meal.

    • Dorine Lam RDN says:

      For blood type O, You can take fresh wild or farmed salmon, but do avoid smoked salmon, which is not allowed for all blood types. Eggs is allowed occasionally.

      Low energy and tiredness is a warning sign that the body is running out of fuel and usually points to underlying problems. If your doctor cannot find anything wrong with you, consider Adrenal Fatigue as a possible cause. When your adrenals are weak, the body may be unable to handle normal emotional and physical demands of daily living due to metabolic and hormonal imbalances. The body has to draw on its internal reserves, and this may lead to depletion and thus a sense of low energy, feeling tired in the morning despite rest, having to drag yourself to complete your work, and drained by the end of the day.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Ebony Burnett says:

    Can this diet help me gain weight as well? I am having trouble packing on lbs and then if I do gain weight I can’t keep it on. Also, I have acid reflux which from my understanding is low stomach acid .. Is this common in type O’s?

    • Dorine Lam RDN says:

      There may be other issues that cause your inability to gain weight. You should consult your doctor to see why you are having difficulty in gaining weight.

      To help improve your acid reflux, consider the following :

      Take a digestive enzymes 1/2 hr before each meal.
      Do not take any liquids with your meals and within 1 hour after your meals.
      You should also eat 5-6 small meals.
      Do not lay down flat immediately after you eat.
      Avoid spicy foods.
      I also recommend for you to take some probiotics to help strengthen your overall digestive system.

      Dorine Lam, RDN , MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • precious says:

    I’m always constipated, I dont know what to drink anymore, of late I’m having a hip pain that is terribly painful, BT after using laxative it becomes better, I drank almost everything, I even went to hospital CD of constipation, they said my intestines ate full of feases, I don’t know how to clean that please help. Fons

    • Dorine Lam RDN says:

      If you are always constipated, you need to look at the underlying issues. Many a times, I find it is a symptom of Adrenal Fatigue Syndrome. So taken care of the adrenals may improve the digestive system. You may want to the the Adrenal Fatigue Syndrome Test to find out if you have AFS or onot.

      Dorine Lam, RDN, MS, MPH
      Registered Dietitian and Senior Holistic Nutritionist

  • Este Zurnamer says:

    I have difficulty loosing weight. Crave a lot for sugar and salt.

    • Dorine Lam RDN says:

      For blood type O – most important to avoid the following foods to lose weight: wheat (wheat and white flour products), corn, kidney beans, navy beans, lentils, cabbage, Brussels sprouts, cauliflower and mustard green.

      The blood type diet is fitting for most of the people. Due to tremendous variation in individual constitution, there is no guaranteed success with it. If you would like to follow the blood type diet, I would recommend that you follow it vigorously for 3 months, even though you don’t see much harm or benefit in certain food. After 3 months, if you see no improvements in your health, then you can deviate and use the blood type diet as a general guideline and not overeat the foods that should be avoided for your Blood Type, but take them with care and in small amounts.

      Also follow the following as a guide:Blood Type O, Metabolic Syndrome

      • Nick says:

        hello. I noticed that most brassicas are listed here to avoid, but not broccoli or kale. Should those be avoided as well? Or does broccoli differ how we might digest it? Thanks in advance

        • Dorine Lam RDN says:

          This diet is based on a certain protein found in all foods call lectin, and how this lectin reacts to the blood that are specific for each blood type. Broccoli and kale are beneficial for blood type O.

          Dorine Lam, RDN , MS, MPH
          Registered Dietitian and Senior Holistic Nutritionist

          • Mrs. C says:

            I am an O positive, why should Coconut oil be avoided? I thought it was one of the good oils. I was told when heated the properties are less likely to change and that one should never heat olive oil.

          • Dorine Lam RDN says:

            You have some very good valid questions. Blood Type Diet is based on how the protein in the food called lectin affects blood agglutination. The diet is founded by Dr Peter D’adamo. There are some principles in the blood type diet that are not accepted in conventional medicine and their recommendations. Ie coconut and soy are some of these discrepancies.

            Dorine Lam, RDN, MS, MPH
            Registered Dietitian and Senior Holistic Nutritionist