Blood group O+

The following foods are those that supporters of the Blood Type Diet recommend for those with O type blood. It is worth noting again that there is little reliable evidence to support the use of this diet.


What to eat.

Animal proteins

Group of important proteins, meats, fish, dairy, eggs, white meat on a wooden table as background, Shot from above

The diet recommends that people with O blood types should consume “beneficial” animal products, including:

  • beef
  • lamb
  • mutton
  • veal
  • venison
  • cod
  • herring
  • mackerel

People with type O blood following the diet are allowed to consume most meat products, including cold-water fish. Exceptions are listed further down this article.


Various fresh dairy products on wooden background

Although dairy and eggs should be avoided, people following the diet can occasionally consume products including:

  • butter
  • cheeses, such as farmer, feta, mozzarella, and goat cheese
  • soy milk


Most beans are believed to be well-tolerated by people with type O blood, the most beneficial being:

  • aduke beans
  • azuki beans
  • pinto beans
  • black-eyed peas


While most grains should be avoided, there are a few that are tolerated, including:

  • amaranth
  • barley
  • buckwheat
  • rice
  • kamut
  • kasha
  • millet
  • rye
  • spelt
  • essene and ezekiel breads


Except for a few that should be avoided, many vegetables are believed to be well-tolerated. Some of those recommended for the diet include:

  • tomatoes
  • artichoke
  • chicory
  • dandelion
  • garlic
  • horseradish
  • kale
  • okra
  • onions
  • parsley
  • parsnips
  • red peppers
  • sweet potatoes
  • pumpkin
  • seaweed
  • turnips


As with vegetables, most fruits are believed to be well-tolerated. Some of the recommended fruits for people with type O blood include:

  • plums
  • prunes
  • figs
  • grapefruit
  • most berries


Drinks that people following the diet can enjoy include:

  • seltzer water
  • club soda
  • tea
  • wine

Foods to avoid

Supporters of the diet state that people with type O blood may experience unwanted weight gain when they eat certain food groups, such as dairy and gluten-containing wheat products. These foods may lead to an inflammatory and autoimmune response.

Animal proteins

The diet recommends that people with type O blood should avoid:

  • pork, including ham and bacon
  • goose
  • barracuda
  • pickled herring
  • catfish
  • smoked salmon
  • caviar
  • octopus
  • conch


People following the diet should avoid dairy products, specifically:

  • those not mentioned in the “allowed” list above
  • yogurt


Certain nuts should be avoided according to the diet, including:

  • Brazil nuts
  • cashews
  • peanuts
  • pistachios
  • poppy seeds


Certain beans should be avoided by people following the diet, including:

  • beans, such as copper, kidney, and tamarind beans
  • lentils, such as domestic, green, and red


The diet recommends that people with type O blood avoid:

  • corn
  • gluten
  • graham
  • bulgur, durum, sprouted, white and whole wheat, wheat germ, and bran
  • farina
  • oat
  • seven-grains


The Brassica family of vegetables, including broccoli, cauliflower, Brussel sprouts, and cabbage, is recommended to be avoided on the O diet.

Although many vegetables are well-tolerated, it is recommended that people following the diet avoid:

  • vegetables in the Brassica family, including cabbage, Brussels sprouts, cauliflower and mustard greens
  • alfalfa sprouts
  • shiitake mushrooms
  • fermented olives
  • vegetables from the nightshade family, including eggplant and potatoes
  • corn
  • avocado
  • leek


As with vegetables, the diet recommends avoiding a number of specific fruits:

  • melons, cantaloupe, honeydew
  • oranges
  • tangerines
  • strawberries and blackberries
  • rhubarb
  • coconut and products that contain coconut

Spices and condiments

Spices and condiments to be avoided in the diet include:

  • pepper, both white and black
  • vinegar
  • capers
  • cinnamon
  • cornstarch and corn syrup
  • nutmeg
  • vanilla
  • ketchup
  • pickles
  • mayonnaise
  • relish


Drinks that the diet recommends avoiding include:

  • beer
  • coffee
  • distilled liquor
  • black tea



Blood Type Diet recommend

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