Recently, I read the book Good Energy by Dr. Casey Means. (Actually, I listened to it while driving around Denver.) As a functional medicine clinician, I found Dr. Means’ entry into the field of functional medicine quite interesting.
The CYP1A2 gene variant refers to genetic variations in the CYP1A2 gene, which encodes the cytochrome P450 1A2 enzyme. This enzyme is responsible for metabolizing various substances, including caffeine, in the body. The two most common CYP1A2 gene variants are often referred to as "slow metabolizers" and "fast metabolizers." Here are some questions and answers about the gene: