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.

Two microscopic parasites cause widespread diarrheal illness across America

You've seen the alarming headlines about parasites causing "explosive diarrhea" across the U.S. Two microscopic parasites – cyclospora cayetanensis and cryptosporidium – can both cause prolonged gastrointestinal illness, including watery diarrhea, stomach cramps, and dehydration.

24 Jul 2026

Two heart nerve cell types sustain cardiac stability in mice

Researchers identified two major intrinsic cardiac neuron populations in mice: Npy-positive neurons regulate parasympathetic heart rate control and support coronary perfusion, while Ddah1-positive neurons help maintain electrical stability during extreme stress. Removing Npy-positive neurons caused fatal cardiac failure, whereas loss of Ddah1-positive neurons increased susceptibility to malignant arrhythmias and sudden cardiac arrest under stress.

23 Jul 2026

Moderate coffee intake may support heart health, AHA says

The American Heart Association finds that habitual coffee consumption is associated with lower risks of several cardiovascular outcomes, although most evidence comes from observational studies. Moderate intake is generally safe for most adults, while energy drinks and individual caffeine sensitivity may increase cardiovascular concerns.

21 Jul 2026

High doses of caffeine from energy drinks cause cardiovascular harm

Previous studies have found that caffeine is the world's most popular stimulant and psychoactive substance, and coffee is the most common way people consume caffeine.

20 Jul 2026

Study finds some sweeteners can slow the growth of gut bacteria

Cambridge researchers have shown how commonly-used sweeteners slow the growth of certain gut bacteria.

16 Jul 2026

Evening chronotype links later eating with higher body fat

Research shows evening chronotypes in women consume more energy later, leading to higher body fat and metabolic issues, highlighting chrono-nutrition's role.

16 Jul 2026

Vaping or smoking found to reduce fitness in young people by 15%

Young people who vape or smoke cigarettes have reduced blood vessel functionality, breathing efficiency and exercise capacity compared to those who have never smoked or vaped, according to a study published today in ERJ Open Research.

14 Jul 2026

Vaping reduces fitness and blood vessel function in young adults

13 Jul 2026

Cosmetic microneedles deliver actives where creams struggle

This review shows how microneedle-based cosmetic systems bypass the stratum corneum to deliver poorly penetrating actives, including peptides, retinoids, vitamins, niacinamide, hyaluronic acid, and hair-growth compounds, into viable skin layers.

8 Jul 2026

Blood metabolites reveal lifestyle links to brain health before dementia

Blood metabolome profiling in dementia-free middle-aged adults linked 14 metabolites to cognition and 22 metabolites to MRI markers of brain health. Lifestyle, clinical factors, medication use and gut microbiota appeared to shape many of these metabolites, with ergothioneine emerging as a notable cognition-linked signal.

25 Jun 2026

More daily steps translate to improved mental health and better sleep among college students

University students who aren't always enthused about walking across campus for class can take heart in new research that suggests lots of daily steps translates to improved mental health and better sleep.

9 Jun 2026

AI-designed molecular switch uses caffeine to control engineered cells

For many of us, a warm cup of coffee is how we start our day. For Texas A&M Health researchers, it may also offer a new way to control engineered cells in future medicines.

8 Jun 2026

EEG reveals how coffee may secretly lower sleep quality

Evening coffee has sparked controversy for years. Some people fall asleep without difficulty, while others toss and turn for half the night.

27 May 2026

CDC report reveals what 24 years of nutrition biomarkers say about America’s health

The 2026 CDC Nutrition Report will make nearly 24 years of NHANES biomarker data easier to use, covering up to 131 nutritional biomarkers in the US population aged 1 year and older. By standardizing blood and urine biomarker trends, demographic patterns, and comparisons of supplement use, the report aims to support nutrition policy, clinical reference intervals, and public health monitoring.

24 May 2026

What medicine-exposed rats reveal about the next urban zoonotic threat

Researchers found that more than half of urban rats sampled from low-income communities in Salvador, Brazil, carried active pharmaceutical ingredients in their brain tissue. These pollutants were associated with altered zoonotic infection patterns, including lower Leptospira infection probability in rats carrying azithromycin and higher Capillaria infection probability in rats carrying citalopram.

22 May 2026

Exercise or caffeine? Study finds neither clearly beats placebo for mental fatigue

Researchers compare the effects of caffeine and aerobic exercise on mental fatigue in adults.

10 May 2026

Drinking coffee alters your microbiome, mood, and memory

Coffee consumption influences the microbiota-gut-brain axis, affecting cognitive performance and emotional regulation through complex biological pathways.

24 Apr 2026

Coffee impacts the gut-brain axis to improve mood and stress

New research from APC Microbiome Ireland, a world leading research centre at University College Cork, has comprehensively explored the mechanisms behind coffee's positive effects on the gut-brain axis for the first time.

21 Apr 2026

Eating oranges daily may shift lipid patterns in fatty liver disease

A 4-week trial on 'Navelina' oranges shows potential effects on lipid metabolism in fatty liver disease, revealing intriguing but non-significant patterns.

20 Apr 2026

Beetroot supplement raises nitric oxide markers in triathletes after one week

A randomized cross-over pilot study in 10 amateur male triathletes found that a beetroot-based multi-ingredient nitrate supplement increased nitric oxide-related and redox biomarkers over 7 days without evidence of lipid oxidative damage. The supplement was generally well tolerated, but the study did not measure whether these biochemical changes improved performance or recovery.

13 Apr 2026