A large cohort study finds a U-shaped association between caffeine intake and chronic constipation risk; intakes < 204 mg/d ...

Medically reviewed by Jurairat J. Molina, MD Caffeine is a substance that raises alertness and boosts energy. Most adults can safely consume up to 400 milligrams of caffeine daily, equivalent to about ...

Caffeine blocks adenosine, the brain chemical that makes you feel tired. Less adenosine means more alertness, more focus, and a greater willingness to suffer.

However, have you ever wondered how long does it take for coffee to get absorbed into our body? And how long does it take to ...

Drinking coffee in hot weather isn't inherently dangerous if you drink other liquids, too. Although caffeine is a diuretic, ...

Why your morning coffee is making you more tired and this caffeine trap could be sabotaging your energy levels all day long ...

A doctor has warned that most Australians are drinking coffee in the wrong way and it can have dire consequences.

Increased Dopamine Levels In other cases, caffeine can boost your mental well-being. It boosts the flow of dopamine, a brain chemical that makes you feel happy and engaged with the world around you.

Caffeine blocks a chemical called adenosine, which is what normally makes you feel tired. That’s exactly why your morning Americano gives you that glorious alert-and-focused state of mind.

Learn how too much caffeine consumption can not only increase anxiety, but also increase the symptoms of an existing anxiety disorder.

Caffeine can linger in your body many hours after consumption — we explore how this impacts your sleep.

Producers decaffeinating their coffee want to remove the caffeine while retaining all – or at least most – of the other chemical aroma and flavor compounds.