The blood type diet is a food regimen developed by a naturopathic doctor called Dr Peter D’Adamo and is designed for achieving optimum health while avoiding disease and illness. It works on the basic principle that the different blood types came into being at different points in human evolution and the dietary needs of each group are quite specific as a result.
For a more in depth explanation see the blood type diet article. Now let us look at the blood type O food list.
List of Foods for Blood Type O
Blood type O was the original blood type, the only one that existed in the beginning. All blood type O carrier’s systems retain the memory of ancient times and require a diet matched to the meat eating, hunter-gatherer with a hardy digestive tract who thrived on animal protein while requiring little carbohydrate.
The ‘Eat Right 4 Your Type’ book by Dr D’Adamo lists all food from different groups under three headings – ‘highly beneficial’, ‘neutral’ and ‘avoid’. It also includes recommendations for weekly portions of each food source. The lists below are a very short summary of those and of course much abridged.
1.) Meat, offal, poultry and game – as you would imagine, the dietary recommendations for blood type O are heavily influenced by meat. However, Dr D’Adamo recommends that this is mainly sourced from organic and free range options to avoid the high saturated fat content found in so much modern farm meat which leads to greater risk of coronary diseases, stroke and cancer. All meats are acceptable up to a maximum amount of 175g portions at each meal but avoid bacon, goose, ham and pork.
2.) Seafood – only second to the meat groups for animal protein sources and particularly suited to blood type Os of Asian and Eurasian descent whose ancestors consumed seafood as a dietary staple.
Seafood, often a rich source of iodine, helps to address the hypothyroidism or low level of thyroid hormones to which blood type Os are prone which in turn leads to weight gain.
Seafoods to avoid for bloodtype O includes smoked salmon, octopus, pickled herring and caviar.
3.) Dairy products – blood type Os have internal systems ill equipped to deal with dairy products which were incorporated into the diet much later in the history of human development. For blood type Os there are no foods which fall into the ‘highly beneficial’ category and only a few ‘neutral’ which are butter, feta cheese, goat’s cheese and Mozzarella cheese. All other dairy products should be avoided wherever possible or substituted with soy cheese and soy milk.
4.) Nuts and seeds – avoid Brazil nuts, cashews, peanuts and peanut butter, pistachios and poppy seeds. Otherwise nuts and seeds can help to supplement protein needs but mustn’t replace the staple of animal protein.
5.) Beans and pulses – beans and pulses are not a high priority for type Os dietary needs and should be eaten in moderation due to their lectin content which can affect physical performance. Avoid kidney beans, navy beans and lentils.
6.) Cereals and breads – whole-wheat products are anathema to blood type Os and should be totally eliminated from the diet for maximum health. Whole-wheat interferes with metabolism processes and absorption of other essential nutrients from food. The ‘neutral’ list of cereals includes oat bran, oatmeal, barley, amaranth, buckwheat, rice bran and spelt. Breads made from any of the above are classed as neutral as are brown rice bread, ryvita crisp-breads, millet bread and gluten free breads. All other cereals and breads are to be avoided.
7.) Grains and pastas – these are also mainly to be avoided by type Os particularly couscous, durum wheat flour, plain flour, whole-wheat flour and semolina pasta. Gluten free pastas are available.
8.) Vegetables, spices and herbs – many vegetables are listed as highly beneficial or neutral with the main vegetables to be avoided falling into the brassica family which includes sprouts, cabbage and cauliflower. Also to be avoided are sweetcorn, potatoes, cultivated mushrooms, aubergines, avocado and cinnamon, nutmeg, vanilla and pepper.
9.) Fruits – essential for their vitamin, fiber and mineral content, the only fruits that should be avoided by type Os are oranges, coconuts, strawberries, rhubarb, Cantaloupe and Honeydew melons and blackberries.
Blood Type O Weight Loss Diet
The most important thing for type Os to observe when trying to lose weight is complete avoidance of grains, breads and pulses. Gluten will make the metabolism sluggish and inefficient in converting these foods to energy, storing them as fats instead.
The other important thing for type Os to remember is their blood type tendency to hypothyroidism as discussed earlier in this article. Under-active thyroid functioning will lead to weight gain and fluid retention. Many sea-foods, containing good iodine sources will help to combat this problem as will avoidance of gluten and sweetcorn which have the opposite effect.
Lifestyle Recommendations for Blood Type O
Deep within the genetic make-up of blood type Os is the memory of extreme physical exertion which was a part of having to hunt to provide food. Blood type Os thrive on vigorous exercise to release the build up of stress hormones, the kind responsible for the fight or flight reaction which are particularly prevalent in type Os, dependent on it to quite literally survive on a daily basis.
Blood type Os often struggle with losing weight where constant and high level exercise regimes are not followed.
Those who are blood type O may have already identified that little exercise and low protein diets can make them miserable and ultimately depressed and overweight.
The summary here is very much abridged but covers a few of the more salient points concerning blood type Os particular dietary needs. For a much more in-depth exploration or explanation for much of the above then Dr D’Adamo’s book series will be beneficial. Many of the full blood type O food list previously only available in hard copy are now also available on-line.