How testosterone production really works: the brain-gonad feedback loop explained
Testosterone is produced through a tightly regulated feedback loop between the brain, pituitary gland, and testes—not through exercise alone. Chronic…
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How Your Body Stores and Deploys Nutrients: A Systems View of Micronutrient Management
Your body operates sophisticated storage systems for different micronutrients, with vitamins and minerals following distinct tissue-specific pathways that determine how…
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Brain-Computer Interface Restores Speech in ALS Patient After Two Years of Home Use
A person with ALS used an implanted brain-computer interface to restore speech and computer control independently at home for over…
Oral GLP-1 medication shows major promise for type 2 diabetes: weight loss and blood sugar control in pivotal trial
A pivotal clinical trial demonstrates that a new oral GLP-1 medication achieves substantial improvements in blood sugar control and weight…
High Tyrosine Levels Linked to Reduced Life Expectancy in Men, Large Study Suggests
A large-scale epidemiological study has found that men with higher circulating levels of tyrosine—a common cognitive enhancement supplement—show reduced life…
Calcium and Vitamin D Supplements Show Limited Benefit for Fracture Prevention in Older Adults, Major Review Finds
A comprehensive systematic review of nearly 154,000 older adults challenges decades of clinical guidance, finding that calcium and vitamin D…
Nasal spray reaches women’s brains differently across menstrual cycle, new study reveals
Research shows that nasal sprays penetrate women's brains at different rates depending on their menstrual cycle phase, revealing how standard…
1 billion children exposed to multiple climate hazards simultaneously, UNICEF warns
UNICEF warns that over 1 billion children face three or more overlapping climate hazards simultaneously, with unequal exposure concentrating risk…
Serological Testing and Mathematical Models Align on True COVID-19 Burden
A December 2026 study in Global Health Action confirms that serological surveys and mathematical epidemiological models produce concordant estimates of…
Mobile Health Tools Strengthen Tuberculosis Contact Tracing in Low-Resource Settings
A scoping review in Global Health Action identifies how mobile health platforms enable community health workers to conduct systematic tuberculosis…