The Best Diet for Type O Blood

Are you wondering what the best diet for your type O blood is? Discover the benefits of following a tailored diet specifically designed to support your body and optimize your well-being. You can enjoy improved health and longevity with the right nutrition for your blood type.

Quick facts: Best Diet For Type O Blood

  • ✅ Type O Blood Diet is high in meat, fish, and vegetables and low in grains, beans and dairy – Harvard Health Publishing (Harvard Medical School)
  • ✅ Type O Blood Diet should be high in protein and monounsaturated fats – Cleveland Clinic
  • ✅ Type O Blood Diet should include lean meats, seafood, and plant-based sources of protein – Mayo Clinic
  • ✅ Type O Blood Diet should include foods high in fiber –
  • ✅ Type O Blood Diet should incorporate foods high in antioxidants and vitamins – International Food Information Council Foundation


The Best Diet for Type O Blood is a comprehensive guide to eating for those with type O blood. This diet focuses on eating whole, unprocessed foods that are high in protein and low in carbohydrates to help provide your body with the nutrients it needs. This diet will help improve your overall health, reduce inflammation, and support healthy digestion. It can also assist with weight loss and maintaining a healthy weight.

Much of the focus is placed on the importance of including plenty of fruits and vegetables, lean proteins, healthy fats like avocados and olive oil, whole grains like quinoa and oats, nuts, seeds and legumes in your diet. Additionally, it is important to drink plenty of water while following this diet to stay hydrated and maintain good health.

What is Type O Blood?

Type O blood is a type of blood group determined by the presence or absence of certain antigens located on the surface of red blood cells. It is one of the four major blood types in humans, along with A, B, and AB.

Type O blood is considered to be one of the oldest human blood types, and it is believed that people with this type have a genetic mutation dating back to prehistoric times.

People with Type O benefit from diets higher in lean protein such as fish, lean meat and poultry; whole grains; low-fat dairy; plenty of fruits and vegetables; nuts and legumes; healthy fats like extra virgin olive oil; and limited amounts of processed foods that are high in sodium. Additionally, they should limit caffeine intake as it can negatively affect their digestion. Eating several small meals throughout the day can also help regulate metabolism among people with Type O Blood.

Benefits of a Type O Diet

A well-planned diet designed specifically for people with blood type O can provide numerous health benefits. Type O is the most common blood type, and it is believed to have originated in the Stone Age, when hunter-gatherers subsisted primarily on a diet of lean protein, vegetables, and fruits. Eating the right foods for your blood type can help you feel more energetic, manage weight, and even prevent certain illnesses.

Let’s take a closer look at the benefits of a type O diet:

High Protein Intake

High protein intake is one of the key components of the Type O diet, as protein helps to rebuild and repair lean muscle tissue. Protein also helps to reduce cravings, increase metabolism, and regulate mood.

High-protein sources recommended on the Type O diet include wild-caught fish and shellfish, pasture-raised eggs, grass-fed beef and other grass-fed Hormone Free (HF) meats. It’s important to note that high-protein sources should contain healthy fats such as Omega 3s in order to provide essential amino acids which aid in metabolizing the proteins.

Other benefits associated with increasing protein intake on the Type O diet include:

  • Improving cardiovascular health
  • Improving digestive health
  • Improving immunity
  • Improving weight loss/maintenance

Low Carb Intake

Low carb diets are often recommended for those with Type O blood as they can help regulate and maintain insulin levels. Low carb diets also promote weight loss, support balanced hormone levels, and reduce inflammation.

Low-carb eating means cutting back on refined carbohydrates such as white bread, pasta, and sweets and focusing on nutrient-dense whole foods like nonstarchy vegetables, high-quality proteins like fish, lean meats and poultry, nuts, seeds and healthy fats.

To keep carbs low in your diet you should avoid processed foods with added sugars, starches (like potatoes), grains (such as wheat), added sweeteners (including corn syrups) as well as legumes like dried beans and peas. Eating foods rich in fiber can also help you stay fuller while reducing your carb intake. Fiber helps control blood sugar by slowing the absorption of sugar into your bloodstream.

High Vegetable Intake

High vegetable intake is beneficial for Type O Blood. Vegetables are an important source of antioxidants, vitamins, minerals and dietary fiber that boost your immune system and provide essential nutrition for a healthy body.

Eating a variety of vegetables will provide you with the optimal amount of nutrients which are important in the development of healthy red blood cells and other processes related to your body’s ability to fight off infection and illnesses. Additionally, vegetables are low-calorie foods that provide bulk, helping you feel full while keeping your calories in check.

Aim to eat at least three servings of vegetables per day, focusing on dark leafy greens, as they contain small amounts of iron which can help with anemia that may be caused by Type O Blood.

Foods to Avoid

Type O blood individuals should mostly avoid foods containing wheat, barley and rye, as they are known to cause inflammation in the body. Additionally, they should avoid foods containing pork, lamb, and beef, as these contain lectins that can be difficult to digest.

Let’s take a look at a few other foods that Type O blood individuals should avoid:

Dairy Products

Dairy products, such as milk, cheese, and yogurt, should be avoided when following the Type O Blood Diet. People with Type O blood are said to have a higher production of stomach acid and thus may have difficulty digesting dairy. Additionally, dairy may cause people with Type O blood to experience more bloating than other types.

To make up for the lack of dairy products in the diet, there are many replacements that can be incorporated such as:

  • unsweetened almond milk or cashew milk instead of cow’s milk.
  • Yogurt can be replaced with non-dairy alternatives like plant-based yogurt made from coconut or other nut milks.
  • Olive oil and coconut oil can replace butter in recipes when cooking.


Grains, such as wheat and rye, are considered to be one of the more challenging foods for Type O Blood to digest. As a result, individuals with this blood type should try and avoid consuming them whenever possible. Wheat, in particular, can cause issues with bloating, water retention and digestive discomfort for people with Type O Blood.

Instead of eating grains like wheat or rye breads, individuals should opt for grains like quinoa or amaranth instead. These are safer options for people with this blood type as they are easier to digest and do not cause the same level of discomfort as other grain-based foods do.

Additionally, when opting for grains as a meal option, it is important to make sure that everyone else in the household is also eating grain-free food in order to limit any potential cross-contamination.


Legumes, such as beans and lentils, should typically be avoided if you follow the Blood Type Diet for type O blood. While legumes are a source of complex carbohydrates, they are considered “avoid” foods because they contain lectins that are not beneficial to type O blood. Lectins can alter the gut bacteria and intestinal environment, which can lead to digestion issues. Additionally, legumes are often cross-contaminated with grains and seed lectins, which can increase the risk of inflammation. Therefore, it is best to limit your intake of legumes if you follow the Blood Type Diet for type O blood.

Legumes that should be avoided include:

  • Chickpeas
  • Black beans
  • Navy beans
  • Pinto beans
  • Kidney beans
  • Lima beans

Soybeans should especially be avoided due to their high concentrations of toxins that can be damaging to your health.

Foods to Include

The best diet for type O positive or negative is a high-protein, low-carbohydrate one. This type of diet will help provide the essential nutrients that are needed while avoiding some of the foods that can be harmful. A type O diet can include lean proteins, vegetables and fruit, whole grains, and healthy fats.

Let’s take a closer look at the foods that should and should not be included in a type O diet:


Seafood is an important food item to include when following a diet for type O blood. Seafood can provide large amounts of high-quality protein, omega-3 fatty acids, iron, and other essential nutrients. Certain types of seafood including shellfish, salmon, and cod can be excellent sources of healthy fats that can help aid in weight loss and reduce inflammation. Other types such as tuna and shrimp are also rich in vitamins and minerals that promote overall health.

Additionally, consuming seafood on a regular basis has been linked to improved mental health and cognitive functioning as well as a lower risk for depression and anxiety related illnesses. As part of a balanced diet for type O blood, it is recommended to eat a variety of seafood at least twice per week to provide the body with all the nutrients it needs.

Red Meat

Red meat is a great food to include in the best diet for Type O Blood. This type of meat contains high amounts of iron, vitamin B12, and zinc which are all essential nutrients for those with Type O Blood. It has also been suggested that the higher levels of iron found in red meat can help keep skin looking healthier due to its ability to improve blood circulation. Red meat is also a great source of protein which helps build strong muscles and bones, as well as providing energy for daily activities.

When making your selection, choose lean cuts such as sirloin steak and trimmed pork loin or opt for grass fed beef when possible. Red meats should be cooked on low heat rather than grilled or barbecued over high heat in order to avoid charring which can cause carcinogenic compounds to form from the fat and protein in the meat.

Fruits and Vegetables

Fruits and vegetables are an important part of any diet, especially for people with type O blood. Fruits and veggies are loaded with essential vitamins, minerals, and other nutrients that help your body stay healthy. However, for type O’s specifically, these foods contain compounds that can help balance out their different bodily functions.

For example, tomatoes contain natural substances called lectins that can strengthen the digestive system. Cruciferous vegetables such as broccoli and cauliflower are high in sulfur-containing compounds which help improve liver function. Leafy greens such as spinach are full of folates that can help with cell division in the body and reduce the risk of certain diseases. Additionally, consuming more colorful produce like berries and oranges helps to add antioxidants to your diet which can protect against cellular damage.

By including a variety of fruits and vegetables in your daily diet you’ll be able to see the many benefits they have to offer type O’s!


The best diet for those with type O blood is one that emphasizes high-protein, low-carbohydrate foods such as lean red meat, fish, poultry, eggs, and vegetables. Additionally, type O individuals should avoid refined carbohydrates and sugar as well as dairy products and wheat. Eating timely meals helps maintain a healthy weight and improves overall health.

By making simple changes to their eating habits, individuals with type O blood can obtain a variety of health benefits. By emphasizing protein-rich foods including lean sources of red meat, fish, poultry and eggs in their diets while avoiding foods such as dairy and wheat products that can lead to digestive issues in those with type O blood will help improve overall health. The addition of more vegetables to the diet provides vitamins and minerals essential for optimal nutrition and lifestyle.

FAQs about: Best Diet For Type O Blood

Q1: What foods do people with type O blood eat?

A1: People with type O blood should focus on a diet high in protein, such as lean meats, fish, and beans, as well as vegetables, fruits, and whole grains. Foods to avoid include dairy, wheat, and processed foods.

Q2: What is the benefit of a type O diet?

A2: The type O diet helps to reduce inflammation and balance the body’s pH levels, which can help improve overall health. It can also help to improve digestion and reduce symptoms associated with digestive issues.

Q3: What type of exercise is recommended for people with type O blood?

A3: Exercise that focuses on strength and endurance, such as weight training and cardio, is recommended for people with type O blood. Additionally, yoga and other forms of low-impact exercise can be beneficial.

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