Caffeine News and Research

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Caffeine is a bitter substance found in coffee, tea, soft drinks, chocolate, some nuts and certain medicines. It has many effects on the body's metabolism, including stimulating the central nervous system. This can make you more alert and give you a boost of energy.

For most people, the amount of caffeine in two to four cups of coffee a day is not harmful. However, too much caffeine can make you restless, anxious and irritable. It may also keep you from sleeping well and cause headaches, abnormal heart rhythms or other problems. If you stop using caffeine, you could get withdrawal symptoms.

Some people are more sensitive to the effects of caffeine than others. They should limit their use of caffeine. So should pregnant and nursing women. Certain drugs and supplements may interact with caffeine. If you have questions about whether caffeine is safe for you, talk with your health care provider.
First of its kind 45-day HERA mission incorporates sleep reduction for research purposes

First of its kind 45-day HERA mission incorporates sleep reduction for research purposes

Preemies treated with caffeine have better lung function in mid-childhood, study finds

Preemies treated with caffeine have better lung function in mid-childhood, study finds

Study reveals link between coffee and low mortality

Study reveals link between coffee and low mortality

Cocoa and chocolate consumption could provide beneficial effects on cognitive function

Cocoa and chocolate consumption could provide beneficial effects on cognitive function

Identifying overactive bladder syndrome

Identifying overactive bladder syndrome

Study shows septic systems as important sources of emerging contaminants in drinking water

Study shows septic systems as important sources of emerging contaminants in drinking water

New approaches to early detection of Parkinson's disease on the horizon

New approaches to early detection of Parkinson's disease on the horizon

Researchers examine antioxidant, anti-inflammatory properties of coffee beans at different roasting levels

Researchers examine antioxidant, anti-inflammatory properties of coffee beans at different roasting levels

Drinking few cups of coffee or tea may protect against liver fibrosis, study finds

Drinking few cups of coffee or tea may protect against liver fibrosis, study finds

Officers who work afternoon shifts more likely to be tired, study finds

Officers who work afternoon shifts more likely to be tired, study finds

Bed partners may unintentionally contradict treatment recommendations for insomnia patients

Bed partners may unintentionally contradict treatment recommendations for insomnia patients

Summer perils and ways to avoid, treat them

Summer perils and ways to avoid, treat them

Study provides insight into mental resilience of journalists

Study provides insight into mental resilience of journalists

Energy drinks linked to risk of cardiac events in young people with familial long QT syndrome

Energy drinks linked to risk of cardiac events in young people with familial long QT syndrome

Heart health impact of energy drinks compared to other caffeinated beverages

Heart health impact of energy drinks compared to other caffeinated beverages

Drinking more than three cups of Italian-style coffee each day lowers prostate cancer risk

Drinking more than three cups of Italian-style coffee each day lowers prostate cancer risk

Working memory training combined with brain stimulation can improve performance, research shows

Working memory training combined with brain stimulation can improve performance, research shows

Systematic Review reveals safe levels of caffeine intake

Systematic Review reveals safe levels of caffeine intake

Stair walking can enhance feelings of energy than caffeine

Stair walking can enhance feelings of energy than caffeine

AANP urges patients to prioritize sleep for better health and well-being

AANP urges patients to prioritize sleep for better health and well-being