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Can caffeine make you mentally sharper in the morning? This study tested the idea

In a controlled crossover study of 51 recreationally active young men with low habitual caffeine intake, researchers tested whether 300 mg of caffeine taken about an hour before morning testing affected cognition, mood, temperature, appetite, and related outcomes, with reactive agility assessed in 27 participants. Caffeine did not improve cognitive or reactive agility performance or meaningfully alter mood, tiredness, appetite, or thermoregulation under the study conditions.

27 Aug 2026

How electrical engineering ensures accurate calibration and patient safety

Discover how electrical engineering supports calibration accuracy, device reliability, and patient safety in critical healthcare applications.

From Mesa Labs, Inc. 22 Jun 2026

New blueberry-sized ingestible sensor tracks internal body temperature

In a hospital or at home, temperatures are usually taken using an oral or forehead thermometer, but these do not always accurately reflect the core body temperature.

15 Jun 2026

Scientists uncover unexpected thermal retention properties inside the cell

Living cells cool much slower than our current understanding of heat conduction can explain, according to new research from the University of Tokyo. Researchers used two techniques - high-speed temperature mapping and artificial heating - to observe how heat dissipated from living cells and similar-sized artificial, fluid-filled sacs (liposomes).

28 May 2026

Childhood flu infection leaves lasting immune imprint

A study reveals how childhood flu infections impact long-term mortality risk, highlighting implications for vaccination and future outbreak management.

17 Apr 2026

How behavior and biology combine to drive addiction

Genomic analyses reveal that addiction risk is influenced by both shared behavioral traits and specific biological factors, informing prevention and treatment.

24 Mar 2026

Scientists reveal how the body senses cold and menthol

When you step outside on a winter morning or pop a mint into your mouth, a tiny molecular sensor in your body springs into action, alerting your brain to the sensation of cold.

22 Feb 2026

A parent's guide to manage pediatric respiratory illnesses during the virus season

As we head deeper into fall and toward the holiday season, your little one may start to exhibit symptoms like a runny nose, cough, or fever.

24 Oct 2025

Scientists crack the secret to perfectly cooked eggs

Researchers developed a ‘periodic cooking’ method using alternating hot and cold water cycles to cook eggs evenly while preserving nutrients and optimizing texture.

9 Feb 2025

Food safety tips to keep illness at bay

Parties, family dinners, and other gatherings where food is served are all part of the holiday cheer. But the joy can change to misery if food makes you or others ill.

31 Jan 2025

Climate change likely to cause a significant rise in heat-related deaths across Europe

Researchers predict that climate change will likely cause a sharp rise in heat-related mortality throughout Europe by the end of this century.

28 Jan 2025

New technology uses gold nanorods to sterilize surgical implants

In the fight against antibiotic resistance, a new technology developed at Chalmers University of Technology, in Sweden, can be of great importance when, for example, hip and knee implants are surgically inserted.

29 Oct 2024

Health authorities warn about bird flu risks in raw milk and undercooked foods

With bird flu virus detected in cow's milk, U.S. health authorities have warned the public against potential sources of exposure, including drinking raw or unpasteurized milk, and have reiterated a general warning that consuming uncooked or undercooked poultry or beef products can make you sick.

29 Jul 2024

Body temperature fluctuations tied to depression severity

Study links higher body temperatures and reduced temperature fluctuations with increased depression severity, suggesting temperature regulation as a potential treatment target.

7 Feb 2024

The intricate interplay of stress, quality of life, and gut microbiota in newly diagnosed breast cancer patients

Researchers investigated the relationship between quality of life (QOL), stress, and gut microbiota in patients newly diagnosed with breast cancer.

24 Oct 2023

Researchers develop first electronic device for continuously monitoring health of transplanted organs

Northwestern University researchers have developed the first electronic device for continuously monitoring the health of transplanted organs in real time.

8 Sep 2023

When temps rise, so do medical risks. Should doctors and nurses talk more about heat?

An important email appeared in the inboxes of a small group of health care workers north of Boston as this summer started. It warned that local temperatures were rising into the 80s.

1 Sep 2023

More cities address ‘shade deserts’ as extreme heat triggers health issues

If it weren't for the traffic along South MacDill Avenue, Javonne Mansfield swears you could hear the sizzle of a frying pan.

28 Aug 2023

What role did children play in household viral transmission during the COVID-19 pandemic, when enveloped virus rates were low, and relative proportions of COVID-19 were high?

Researchers performed a cohort study on a voluntary group in the United States.

6 Jun 2023

Hand-gesture decoding using data from noninvasive brain imaging

Researchers from University of California San Diego have found a way to distinguish among hand gestures that people are making by examining only data from noninvasive brain imaging, without information from the hands themselves.

19 May 2023