A recent BBC report described women posing as men to obtain testosterone gel, hoping to improve their menopause symptoms because female testosterone products are not easily available to them. But why is the appetite for this predominantly male hormone exploding, and are there risks involved?

Cut the power, and the machine stops. That was part of the motivation behind a four-year effort to map all the proteins in the mitochondria—often called the powerhouse of the cell—of the parasites that cause sleeping sickness, giardiasis, leishmaniasis and babesiosis, diseases that together affect nearly a billion people every year.

Tau is a protein that occurs naturally in the brain. It is essential for proper neuron development and for how neurons communicate with each other. The same protein, however, when misshapen or misfolded, can act as a driver of neurodegenerative diseases. Abnormal buildup of tau is a hallmark of Alzheimer’s disease, and scientists have also found an association between misfolded tau and more than 20 neurodegenerative diseases.

Researchers at Upstate Medical University have identified a key mechanism that helps determine the length of myelin, the protective coating that surrounds many nerve fibers and allows signals to travel efficiently through the nervous system.

Indigenous children across the globe are experiencing significant climate-related health impacts, ranging from malnutrition and infectious diseases to effects on mental health and cultural well-being and problems before birth, according to a new study.