Everyday journeys
After a sip
The cup stays on the table. The caffeine keeps travelling.
After absorption, caffeine circulates through the body and can reach the brain. Your liver does much of the work of breaking it down.
A closer look
The picture, in three parts.
Into the blood
Caffeine is absorbed through the digestive tract.
Into the brain
It can interfere with adenosine signalling.
Over time
Metabolism helps the body clear it.
Where could this take you next?
Sources & further reading +
Short explanations, grounded in published sources. Follow the originals for depth and context.
Sources checked: 10 September 2026. Visuals are illustrations, not documentary evidence.
Our approach to sources and corrections