Physiology

Hormones Metabolism Thermoregulation Body Functions Circadian Rhythms Human Body Nervous System Bone Health Body Temperature Regulation Cardiovascular Health

Sleep Loss Raises Synaptic‑Marker Levels in Human Brain, Study Finds

The PET study links extended wakefulness to measurable increases in a synaptic protein that predict stronger deep sleep.

Miami Heat Threatens World Cup Players' Safety and Performance

World Cup Heat Risks Clash With FIFA’s Higher WBGT Threshold

Study Finds About 6.4–7.8 Hours of Sleep Linked to Slowest Organ Aging

Experts Urge Targeted Cooling and Hydration as Heat Hits Homes

Major Study Ties 6.4–7.8 Hours of Nightly Sleep to Slower Biological Aging

Field Study Finds Rivalry Triggers Oxytocin Surge in Men

Yawning May Help Flush the Brain, MRI Study Finds

Fruit Flies Endure Up to 13G, Then Recover, UC Riverside Study Finds

Laura Pausini Pauses Quito Show for Oxygen, Then Resumes

Coffee Alters Gut Microbes and Mind, Peer-Reviewed Study Finds

Single Finnish Sauna Session Temporarily Raises White Blood Cells, Study Finds

Double Shifts Tied to Double Midnight Cortisol in Nurses, Peer-Reviewed Study Finds

Sleep Experts Emphasize Regular Wake Times as New Study Points to Yoga’s Promise

Magnesium Supplement Guidance Stresses Caution on Dose and Diarrhea Risk

Scientists Map Gut-to-Brain Circuit That Cuts Appetite During Parasite Infection

Doctors Outline Non-Food Causes of Blood Sugar Spikes

Italian Spas Spotlight Evidence Linking Thermal Baths to Better Sleep on World Sleep Day

Cardi B Uses Oxygen Backstage After Denver Show, Cites Mile-High Air

Doctors Warn Against Powering Through Colds as New Guidance Flags Complication Risks