What Should You Not Eat If You Have O-Positive Blood? Debunking the Myth
                                
                                
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                                    5 min read                                
                            
                                According to a 2013 review published in the *American Journal of Clinical Nutrition*, there is no scientific evidence to support the claims of the blood type diet. Therefore, the popular claims regarding what you should not eat if you have O-positive blood are based on a theory that has been widely debunked by the medical community.