编辑“血型性格學說”（章节）

==科學研究==
醫學界一般認為血型性格學說缺少可信度，因為在目前的研究中，還沒有發現血型可以影響到大腦神經系統運作，以及影響到思考、人格形成的證據，血型性格學說也沒有提供對於血型如何影響到大腦的科學解釋。然而，2022 年，科學雜誌《自然》發表了三篇關於 ABO 血型和腸道微生物群的論文<ref>{{Cite |author=Yang H et al. |date=2022 |title=ABO genotype alters the gut microbiota by regulating GalNAc levels in pigs |url=https://www.nature.com/articles/s41586-022-04769-z |accessdate=2023-03-11 |archive-date=2023-03-11 |archive-url=https://web.archive.org/web/20230311050157/https://www.nature.com/articles/s41586-022-04769-z |dead-url=no }}</ref><ref>{{Cite |author=Qin Y et al. |date=2022 |title=Combined effects of host genetics and diet on human gut microbiota and incident disease in a single population cohort |url=https://www.nature.com/articles/s41588-021-00991-z |accessdate=2023-03-11 |archive-date=2023-09-26 |archive-url=https://web.archive.org/web/20230926163649/https://www.nature.com/articles/s41588-021-00991-z |dead-url=no }}</ref><ref>{{Cite |author=Lopera-Maya EA et al. |date=2022 |title=Effect of host genetics on the gut microbiome in 7,738 participants of the Dutch Microbiome Project |url=https://www.nature.com/articles/s41588-021-00992-y |accessdate=2023-03-11 |archive-date=2023-03-14 |archive-url=https://web.archive.org/web/20230314091345/https://www.nature.com/articles/s41588-021-00992-y |dead-url=no }}</ref>，表明細菌豐度的差異與抑鬱症和精神疾病存在因果關係。