Cytochrome P450 1A2 (CYP1A2) is involved in drug metabolism. This enzyme is responsible for the break down of 95% of the caffeine in the body.

Not all of us are equally affected by caffeine. Caffeine sensitivity depends on how long it stays around in our bodies. Some of us are

The “slow” genetic variant is associated with lower levels of the CYP1A2 enzyme and a slower rate of caffeine breakdown. People who inherit the “slow”