Part 1: Summary
Overview
- Part 1: Eat Right 4 Your Type summary
- Part 2: Scientific Evidence for and against
- Part 3: Take home message
Part 2: Arguments
Source 1: One Man's Meat
- Some claim that the "nutritional effect of food depends on ancestry, blood type, and metabolic rate" (Cowley).
- People have individual needs nutritionally
- The blood type diet puts us in touch with ancestors
- We eat more processed foods and work out less than our ancestors did
- No clinical studies have been done to prove the diet works
Source 2: Fakes and Fraud in Commercial Diets
Source 3: Blood Type Diets Lack Supporting Evidence: A Systematic Review
- D'Adamo's claim: Lectins in food bind to antigens of ABO system, causing "agglutination" for blood type B (Larhammar)
- Argument: Lectins are present on all cell surfaces in food and body. There is no evidence supporting the agglutination of lectins for certain types
- D'Adamo's claim: Type O is the oldest blood type
- Argument: Type O is actually arose from a recent mutation.
Uses the Grading of Recommendations, Assessment, Development and Evaluation (GRADE) approach to disprove the blood type diet.
- 1415 references were checked.
- 16 articles were identified
- Out of the last 16, only 1 met all requirements
- Talked about MSN blood types. Not ABO blood types.
How to eat right for your type
Type B: The Nomad
Blood Type A: The Cultivator
Diet:
- Balanced and wholesome
- Any meat except chicken
- A wide variety of dairy and eggs
- Oat and rice flour over wheat
- Vegetables five times a day
- Any type of fruit
- Licorice for blood sugar
Exercise:
- A balance between calm and aerobic exercise
- Any exercise that increases heart rate followed by a relaxation exercise
Disease:
Diet:
- Vegetarian
- Limit all meats
- Soy products over dairy products
- Whole grain over flour based foods
- Vegetables and fruits several times a day; they are the vital parts of this diet
- Ginger tea for the digestive tract
Exercise:
- Light exercise over heavy
Disease:
- Heart attacks, gastric cancer
Blood Type AB:The Enigma
Blood Type O: The Hunter
Diet:
- A mix between Type A and B
- Eat meat in moderation. Avoid chicken and flounder because of lectins
- Lots of dairy and egg
- Whole weat in moderation
- All vegetables are acceptable
- Alkaline fruits over tropical
- Herbal teas for the immune system
Exercise:
- Light exercise over heavy
Disease:
Diet:
- A wide variety of meat in moderation, specifically fish
- Eliminate dairy and eggs
- Avoid wheat and other grains when possible
- Most vegetables except alfalfa
- Most fruits except those with high acid-levels
Exercise:
- High-intensity workout
- Cardio
Disease:
- greater susceptibility to infectious diseases
Eat Right 4 Your Type: Fact or Fiction?
by Ian Gregory-Davis and Shannon Gunter
Video
1:08 - 5:00
Part 3: The take home message
- There is no scientific evidence that backs up the blood type diet theory
- The diet probably works for some people due to the placebo effect
- Be critical about what you read in the commercial health world
References
- Cowley, G, and P King. "One Man's Meat. Should you eat, and diet, according to your blood or body type? Or is this a new type of nonsense?". Newsweek 129.4 (1997):75. MEDLINE. Web.
- Cusack, Leila, et al. "blood type diet lacks supporting evidence: a systematic review". The American Journal of Clinical Nutrition 98.1 (2013): 99-104. Web
- D'Adamo Peter J.pHD. Eat Right 4 Your Blood Type: The individualized Diet Solution to Staying Health, Living Longer, & Achieving Your Ideal Weight. New York: Penguin Putnam Inc., 1996. Print
- "Eat Right For Your Type / Blood Type Diet - a Review." Acu-cell.com. The Clinical Research Resource for Cellular Nutrition & Trace Mineral Analysis, n.d. Web. 17 Nov. 2013. <http://www.acu-cell.com/btd.html>.
- FoodNSport. "Blood Type Diet Debunked by Dr. Graham". Online video clip. YouTube. YouTube, 3 Jul. 2012. Web. 17 Nov. 2013.
- Larhammar, Dag. "Fakes and fraud in commercial diets". Food & Nutrition Research [Online], 49.2 (2005): 78-80. Web. 17 Nov. 2013