Blood Type Diet

The Blood Type Diet claims that optimal nutrition varies by ABO type, but a large 2014 study in PLOS ONE involving over 1,000 participants found no evidence supporting blood-type-specific recommendations. This diet's popularity continues despite outperforming #10's scientific acceptance—it is rejected by 95% of registered dietitians surveyed, making it more controversial than the Lectin-Free Diet's unsupported restrictions.