Blood type diets lack supporting evidence: a systematic review. To our knowledge, the evidence to support the effectiveness of blood type diets has not previously. The Cochrane Library. MEDLINE, and Embase were systematically searched by using sensitive search strategies. The identified article studied the variation between LDL- cholesterol responses of different. MNS blood types to a low- fat diet. However, the study did not directly answer the current question. No studies that showed. ABO blood type diets were identified. To validate these claims, studies. To our knowledge, evidence for these claims. Relevant to this study are the following 2 of . ABO blood typing is typically correlated with blood transfusions because ABO blood product incompatibility can potentially. More recently, an extensive collection of epidemiologic studies have assessed the significance of ABO status. From among the varied results (with some consistent and some. ABO blood. type and certain diseases, including pancreatic cancer, venous thromboembolism, and myocardial infarction in the presence. Therefore, it appears possible that the ABO blood group system plays a role in determining an individual's susceptibility. Of the. many authors of blood type diets (4–8), D'Adamo is arguably the most prolific (9–2. Within his initial ABO blood type diet book entitled Eat Right 4 Your Type (9), which was published in 1. D'Adamo claims that each ABO blood type processes food differently, and adherence to a diet. ABO blood group could improve health, wellbeing, and energy levels and reduce risk of developing. D'Adamo diets, one for each ABO blood type, are based on a theory that. The validity of the scientific basis for any of the blood type diets is beyond the scope of this systematic review. All databases were searched from inception to ensure that all relevant articles would be retrieved. Final search strategies were. The subsequent study selection was. Initially, the titles and abstracts identified by the search. PICO question. Full texts of any relevant references were obtained to assess whether exclusion. Independent results from the selection phase were compared to ensure that all relevant studies. See the online Appendix under “Supplemental data” in the online issue for search strategies. The first 2. 0 relevant studies (as suggested by MEDLINE) were also assessed for pertinence to the current review.
In vitro studies were excluded, along with narrative reviews, commentaries. Animal studies were excluded. Intervention. Adherence to a prescribed diet that was designed to improve health was necessary for inclusion. Blood type may affect brain function as. This is her first feature for Scientific American. This is a detailed review of the blood type diet. Most lectins are not blood type specific. Is There Any Scientific Evidence Behind The Blood Type Diet? Scientific Categories; Article Types. Harrison and Vannucchi discuss the Blood Review Series. Any studies with another intervention. The GRADE approach took into consideration any limitations of included studies. After the appropriate downgrading for each of the previously mentioned criteria (or upgrading in certain. A: further research is very unlikely to change. B: further research is likely to have an important impact on our confidence. C: further research is very likely to have an important impact. D: any estimate of effect. Once duplicates were removed, a total of 1. PICO question. The remaining 1. Reasons for inclusion or. Table 1. A flowchart of the study selection process is shown in Figure 1. None of the studies showed an association between ABO blood type diets and health- related outcomes. The identified study analyzed a total of 2. Intervention groups were given the objective of a 2. Control groups did not change their diets. LDL cholesterol values of both control and. MNS blood type were measured at baseline and 6, 1. These values are shown within. Table 2. A difference in responses to the low- fat diet was shown between the MN blood group and the combined MM and NN blood groups. It was concluded that an association exists between MNS blood groups and the variability of responses to a low- fat. MN individuals responding the least. Of interest, LDL- cholesterol concentrations within the MN control group (ie. L (a change of. . The process of random assignment was unclear, and there was a lack of participant blinding (which is somewhat unavoidable. A total of 3. 15 patients were randomly assigned (intervention: n = 1. However. this level was downgraded because of study limitations (a lack of adequate random assignment and allocation concealment along. PICO question). Overall, the strength of the evidence, according to. GRADE approach, was determined as low (C) to very low (D). They have been heavily endorsed on claims. Of the 1. 6 articles identified on the basis of titles and abstracts (Table 1), only 4 articles presented experimental or observational studies. Of these 4 articles, only one article met all of the inclusion. Birley et al (2. 9) compared the variation in LDL- cholesterol concentrations between different MNS blood types (which are functionally distinct. ABO blood types) in response to a low- fat diet. The analysis within the article compared the variation between responses. MNS blood types; however, a comparison between intervention and control groups. This result suggests that individuals with. MM or NN blood type may respond more effectively (in relation to LDL- cholesterol reduction) to a low- fat diet than. MN counterparts. The result also suggests that MNS blood typing should perhaps be considered when developing a. Published in 2. 00. LDL- receptor gene. It was the latter category (other genes) that included genotypic variations in blood type, and Birley et. The systematic review concluded that the results tended to suggest that a variation in the. However, the conclusion also. It was recommended that future studies should include larger sample sizes and investigate effects of polymorphisms in multiple. It seems that there may potentially be a variety of genetic aspects to be considered when the inconsistency of responses. However, the results do not provide any evidence of the purported health benefits of. To specifically validate the health benefits of a promoted diet (ie, a blood type diet), studies. Power (4. 1) claimed to show a clear pattern between ABO blood type and food allergies and hypersensitivities, which were detected after. Some of the results presented by Power (4. ABO blood type diets designed by D'Adamo (9). Although the article by Power (4. PICO question), an overt potential bias was noted because the. Evidence exists that links an increased vulnerability of certain blood. However, there is currently no evidence that an adherence to blood type diets will provide health benefits, despite the. Until the health effects of blood type. None of the authors had a conflict of interest.
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