The System for Award Management (SAM) is an official website of the U.S. government. There is no cost to use SAM. You can use this site for FREE to: Register to do business with the U.S. government. Update or renew your entity registration. Check status of an entity registration. Search for entity registration and exclusion records.
The time it takes for the body to eliminate one half of a caffeine dose is normally between 3 to 12 hours. It is called the half-life of caffeine. Several factors can shorten or lengthen the half life of caffeine. Smoking, medications and diseases are some factors.
How is caffeine broken down and how does it affect your metabolism? How long does caffeine stay active in your system and why do people crave the stuff? Weâll try to answer those questions and more in the simplest terms possible, so that you can be an educated consumer when it comes to caffeine metabolism.