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.

Filtered coffee shows a causal link to healthier HbA1c levels

Genetically predicted filtered coffee consumption is causally associated with lower HbA1c levels, while other coffee preparation methods show no such benefit. This effect appears to be partly mediated by increases in propionate producing gut bacteria, particularly Veillonella.

10 Dec 2025

Doctors warn about cardiovascular dangers from excessive energy drink use

Downing several strong energy drinks every day may pose a serious stroke risk, doctors have warned in the journal BMJ Case Reports, after treating an otherwise fit and healthy man in his 50s with a daily 8-can habit and exceedingly high blood pressure.

9 Dec 2025

Pre-workout supplements linked to dangerously short sleep

Pre-workout supplements are associated with lower sleep duration in young Canadians, highlighting the need for guidance on timing and caffeine content.

5 Dec 2025

Pre-workout supplement use linked to dangerously short sleep in young people

A new study from the Canadian Study of Adolescent Behaviors reveals that adolescents and young adults who use pre-workout dietary supplements, such as Bang!, Jack3D, and C4, are significantly more likely to report dangerously short sleep durations.

2 Dec 2025

Why green tea delivers the strongest health benefits

This review examines tea's health effects, highlighting green tea's benefits for heart health and cognition, and warns about risks in processed tea products.

1 Dec 2025

Drinking three to four cups of coffee a day may slow cellular aging

New findings reveal that 3-4 cups of coffee daily may enhance telomere length, potentially slowing cellular aging in individuals with severe mental disorders.

28 Nov 2025

Moderate coffee intake linked to slower biological aging in people with severe mental illness

Drinking a maximum of 3-4 cups of coffee a day may slow the 'biological' ageing of people with severe mental illness, by lengthening their telomeres-indicators of cellular ageing-and giving them the equivalent of 5 extra biological years, compared with non-coffee drinkers, finds research published in the open access journal BMJ Mental Health.

25 Nov 2025

Does coffee truly boost memory and focus or is it all hype?

Coffee’s bioactive compounds, especially caffeine, show potential cognitive, neuroprotective, and neuroplasticity benefits across animal and human studies. However, most findings are observational, mechanisms remain uncertain, and optimal intake is still unclear.

23 Nov 2025

Coffee protects the brain, metabolism, and immunity at the molecular level

This review uncovers the molecular networks of coffee's compounds, showcasing their antioxidant and neuroprotective effects on immunity and metabolism.

19 Nov 2025

High protein breakfasts help you feel fuller but do not change how much you eat later

High protein breakfasts, whether plant or animal-based, boosted GLP-1 and PYY and modestly reduced appetite compared with a low protein, high carbohydrate meal. Despite these hormonal and appetite changes, lunchtime energy intake remained unchanged in both younger and older adults.

13 Nov 2025

The caffeine conundrum in rapid depression treatments

Perhaps the most intriguing implication of recent breakthrough research lies in an unexpected connection: the most rigorous mechanistic dissection of rapid antidepressant action identifies adenosine as the critical mediator, yet adenosine receptors are the primary target of caffeine, the world's most widely consumed psychoactive substance.

11 Nov 2025

Daily coffee linked to lower risk of irregular heart rhythm episode in AFib patients

Adults treated for atrial fibrillation (AFib) who drank a daily cup of coffee were 39% less likely to have an irregular heart rhythm episode compared to those who avoided all caffeinated products, according to a new study.

11 Nov 2025

One cup of coffee a day could keep atrial fibrillation from coming back

A multicenter randomized clinical trial found that moderate caffeinated coffee intake after cardioversion significantly lowered the recurrence of atrial fibrillation or flutter compared with abstinence. The findings challenge long-standing advice to avoid coffee in cardiac arrhythmia patients and support its safety at typical consumption levels.

10 Nov 2025

Children's oral health remain very poor despite improvements from government interventions

Children's access to NHS dentists and rates of tooth decay remain very poor despite improvements from national government interventions, oral health experts say.

10 Nov 2025

Drinking coffee can protect against atrial fibrillation

Drinking coffee can protect against atrial fibrillation (A-Fib), a common heart rhythm disorder that causes rapid, irregular heartbeat and can lead to stroke and heart failure.

10 Nov 2025

Social media spreads both awareness and misinformation about allergies and asthma

From rare tick-borne meat allergy to everyday asthma, millions of people turn to social media for health advice.

6 Nov 2025

Why health education isn’t stopping young adults from consuming energy drinks

Polish students' energy drink consumption persists despite awareness of health risks, indicating a need for enhanced education and stricter sales regulations.

6 Nov 2025

How branding and peer pressure keep kids hooked on energy drinks

Children and adolescents in North East England still find energy drinks easy to access despite a voluntary UK ban, drawn by taste, price, and powerful marketing. Hydration drinks like PRIME are viewed as “healthier,” even though young consumers often misunderstand their ingredients and health impacts.

28 Oct 2025

Daytime sleepiness in older adults linked to cognitive decline after surgery

People 60 and older who are excessively sleepy during the day may have more problems with memory and thinking after surgery, suggests a study presented at the ANESTHESIOLOGY 2025 annual meeting.

13 Oct 2025

New mothers more likely to experience severe pain and sleep problems after C-section

New mothers are more likely to experience severe pain that disrupts sleep and activities of daily living, as well as develop sleep disorders, if they give birth by cesarean delivery (C-section), suggests research presented at the ANESTHESIOLOGY 2025 annual meeting.

12 Oct 2025