The Blood Type Diet for AB Positive Explained
The AB blood type diet is a dietary plan based on the work of naturopathic doctor Peter D'Adamo, who first popularized the concept in his 1996 book, Eat Right 4 Your Type. The theory behind this diet is that a person's blood type can determine how their body reacts to different foods, with certain foods being more beneficial or harmful than others. For AB positive individuals, the dietary recommendations are a mix of those for Type A and Type B blood types, reflecting the hybrid nature of this blood group.
Recommended Foods for AB Positive
According to the diet's guidelines, people with AB blood type should build their diet around a combination of foods. The following are considered highly beneficial or neutral for consumption:
- Seafood: Lean fish like cod, tuna, and grouper are recommended, as is salmon.
- Dairy: Yogurt, kefir, and goat cheese are typically encouraged, while milk and other dairy products are also deemed acceptable in moderation.
- Grains: Rice, oats, and spelt are good choices. The diet recommends rice-based products, including flour and noodles.
- Legumes: Lentils and pinto beans are on the recommended list, while red beans and navy beans are also considered acceptable.
- Vegetables: Leafy greens, broccoli, cauliflower, cucumber, garlic, and beets are considered beneficial.
- Fruits: A variety of fruits are encouraged, including grapes, plums, berries, and cherries.
- Protein: Aside from seafood, the diet suggests lean meats like lamb, mutton, and turkey. Tofu is also highlighted as a beneficial protein source.
- Oils: Olive oil is the preferred oil.
Foods to Limit or Avoid
The blood type diet also outlines specific foods that AB positive individuals should limit or avoid entirely. The rationale is often linked to potential digestive issues or risks.
- Certain Meats: Red meat (beef and pork), chicken, and smoked or cured meats are typically discouraged. It's suggested that AB individuals have low stomach acid, which can make digesting red meat difficult.
- Specific Grains and Beans: Corn, buckwheat, kidney beans, and lima beans are often listed as foods to avoid.
- Alcohol and Caffeine: The diet suggests avoiding excess caffeine and alcohol.
- Select Fruits: Certain fruits like oranges, bananas, and mangoes are sometimes advised against.
The Lack of Scientific Evidence
It is crucial to understand that the blood type diet is widely considered a myth by the mainstream scientific and medical communities. Several authoritative sources, including Harvard Health and WebMD, have debunked the core claims.
- Systematic Reviews: A 2013 review published in The American Journal of Clinical Nutrition found no evidence to support the claimed benefits of the blood type diet. Other studies have reached similar conclusions.
- Flawed Theory: The theory that different blood types react poorly to certain food lectins has been challenged. Many lectins react with all blood types, and cooking typically neutralizes these proteins anyway.
- Positive Outcomes: Any health benefits experienced by individuals on the diet are most likely due to adopting generally healthier eating habits—such as reducing processed foods and increasing fruit and vegetable intake—rather than the specific food selections related to blood type.
For more information on the lack of scientific backing, you can consult research like the systematic review from The American Journal of Clinical Nutrition.
Blood Type Diet Theory vs. Evidence-Based Nutrition
The following table compares the approach of the blood type diet for AB positive individuals with the principles of evidence-based nutrition.
| Aspect | Blood Type Diet (AB Positive Theory) | Evidence-Based Nutrition |
|---|---|---|
| Basis | Based on evolutionary speculation and reactions to food lectins. | Based on peer-reviewed scientific studies and clinical evidence. |
| Protein | Mixed diet with lean meats (lamb, turkey), fish, and tofu; limits red meat and chicken. | Recommends a balance of lean protein sources, but without restrictions based on blood type. |
| Grains | Encourages rice, oats, and spelt; avoids corn and buckwheat. | Promotes whole grains for fiber and nutrients, irrespective of blood type. |
| Vegetables | Focuses on leafy greens, broccoli, and cucumbers. | Encourages a wide variety of all vegetables for diverse nutrients. |
| Scientific Support | None. Major reviews have found no evidence to support health claims. | Strong, verifiable evidence supports a balanced, varied diet. |
| Personalization | Dictated by blood type, with little room for individual preference or medical history. | Tailored to individual needs, preferences, lifestyle, and health conditions. |
Conclusion
While the AB positive blood type diet offers a specific framework for eating, it is important to remember that it is a theory lacking scientific validation. Reputable medical and nutrition organizations have repeatedly debunked its claims, suggesting that any health improvements are likely due to adopting healthier habits generally, rather than adherence to blood type-specific rules. For AB positive individuals or anyone seeking nutritional guidance, the most reliable and effective approach is to follow the principles of evidence-based nutrition. This means focusing on a balanced, varied diet rich in fruits, vegetables, lean proteins, and whole grains, while considering individual health needs and preferences. Before making significant changes to your diet, always consult a healthcare provider or a registered dietitian.
