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.
Caffeine cannot prevent memory deficits linked to alcohol consumption, study finds

Caffeine cannot prevent memory deficits linked to alcohol consumption, study finds

Research shows how trigger sounds cause brain connection overdrive in misophonia sufferers

Research shows how trigger sounds cause brain connection overdrive in misophonia sufferers

Sleep helps recalibrate brain cells responsible for learning and memory, mice study shows

Sleep helps recalibrate brain cells responsible for learning and memory, mice study shows

Anxiety linked to severe quality-of-life impairment in postmenopausal women

Anxiety linked to severe quality-of-life impairment in postmenopausal women

BetterYou magnesium can raise cellular mineral levels faster than traditional tablets

BetterYou magnesium can raise cellular mineral levels faster than traditional tablets

Oral vitamin spray or topical magnesium spray can help beat the blues, says TV chef Tonia Buxton

Oral vitamin spray or topical magnesium spray can help beat the blues, says TV chef Tonia Buxton

Short-term sleep loss affects cardiac function

Short-term sleep loss affects cardiac function

Moderate coffee consumption may offer protection against age-related cognitive decline

Moderate coffee consumption may offer protection against age-related cognitive decline

Research shows mechanism that induces heart arrhythmias in diabetic mice

Research shows mechanism that induces heart arrhythmias in diabetic mice

Dietary supplement extracted from Amaranthus can increase plasma nitrate, study shows

Dietary supplement extracted from Amaranthus can increase plasma nitrate, study shows

UAB case study details patient experiencing hemorrhagic stroke after consumption of energy drink

UAB case study details patient experiencing hemorrhagic stroke after consumption of energy drink

Short sleepers likely to consume significantly more sugary caffeinated drinks, study finds

Short sleepers likely to consume significantly more sugary caffeinated drinks, study finds

Genetic variation, environmental conditions can have significant impact on human health

Genetic variation, environmental conditions can have significant impact on human health

Vanderbilt sleep specialists offer tips to manage daylight saving time transition

Vanderbilt sleep specialists offer tips to manage daylight saving time transition

Low fat and low carbohydrate diets may prevent migraines

Low fat and low carbohydrate diets may prevent migraines

Brown scientists developing new self-contained SleepCoacher app

Brown scientists developing new self-contained SleepCoacher app

Highly caffeinated alcoholic drinks may induce changes in the adolescent brain similar to cocaine

Highly caffeinated alcoholic drinks may induce changes in the adolescent brain similar to cocaine

Hormone levels in hair can predict chances of pregnancy in women undergoing IVF treatment

Hormone levels in hair can predict chances of pregnancy in women undergoing IVF treatment

Healthy fruit-rich Mediterranean diet may help protect against macular degeneration

Healthy fruit-rich Mediterranean diet may help protect against macular degeneration

Fiscal policies could help reduce consumption of sugary drinks, new WHO report reveals

Fiscal policies could help reduce consumption of sugary drinks, new WHO report reveals