Ability to metabolize caffeine has many variables

ASK THE DOCTORS

Dear Doctors: Have you ever encountered anyone who barely seems to metabolize caffeine at all? I am a 64-yearold woman, and over the last eight years, I have become increasingly unable to tolerate even small amounts of caffeine. I would like to understand why.

Dear Reader: Let’s begin with caffeine, which is a naturally occurring compound found in many leaves, plants and seeds. In th…