For anyone who prefers to go directly to the source, here is the Nature article that this page summarizes: The clinically relevant CYP2C83 and CYP2C92 haplotyp

For anyone who prefers to go directly to the source, here is the Nature article that this page summarizes: The clinically relevant CYP2C83 and CYP2C92 haplotype is inherited from Neandertals https://www.nature.com/articles/s41397-022-00284-6 https://www.nature.com/articles/s41397-022-00284-6 I linked to this popularized version because I found it well written and informative, and easier to understand than the academic article.