Perhaps it’s not news to you that genes affect caffeine metabolism. It makes intuitive sense as we all know that person who can have coffee right before going to bed and still sleep like a baby. A little while ago I got an email announcing a new report derived from my myDNA genetic testing. Which caffeine metabolism genes are tested? myDNA analyses three genes (ADORA2A, CYP1A1-CYP1A2, CYP1A2 and AHR) to derive information about caffeine effect on the brain, caffeine metabolism and whether inducers (foods that boost caffeine metabolism) help or not. My reaction to caffeine I know from experience that whenever I drink coffee in the afternoon, my sleep suffers.…