Sperm count in men from North America, Europe, Australia and New Zealand declined by 50-60% between 1973 and 2011, according to a new study.

A new study has found something remarkable: the activation of a particular type of immune cell in the brain can, on its own, lead to obesity in mice.

Dementia is by no means an inevitable result of ageing. In fact, one in three dementia cases can be prevented, according to new findings published in The Lancet.

Many suffer from heart disease despite the fact they don’t smoke, have healthy diets, and are of a healthy weight.

Disrupting just one night of sleep in healthy, middle-aged adults causes an increase in amyloid beta, a brain protein associated with Alzheimer’s disease, a small study suggests.

Black women who drink more than 14 alcoholic drinks per week have a significantly higher risk of invasive breast cancer than those who drink less, a new study suggests.

When people experience delusions or hallucinations there is usually some loss of contact with reality whereby normal processes of thought and perception are disturbed.

Diet is not a contributing factor to the significant gastrointestinal issues common among children with autism spectrum disorder, research finds.

A universe of organisms living inside you may affect every part of your body, from your brain to your bones, and even your thoughts, feelings and your attempts to lose weight.

There is a lot we can do to make life better for older adults with dementia. And we ought to do what we can – not only because people with dementia are fellow members of our human community, but also because any one of us might find ourselves affected in the future. 

A new study shows that long-time use of heartburn drugs called proton pump inhibitors is associated with an increased risk of death.

In the introduction to his beautiful book The Body Keeps The Score, psychiatrist Bessel Van der Kolk writes: “One does not need to be a combat soldier, or visit a refugee camp in Syria or the Congo to encounter trauma. Trauma happens to us, our friends, our families and our neighbours.”

Do you ever hear a sound when there is nothing around to explain it? Or perhaps you have the feeling that someone is nearby when they’re not?

Maths is the language of science. It crops up everywhere from physics to engineering and chemistry

Women with breast cancer have long faced complicated choices about the best course of treatment.

Do you have anxiety? Have you tried just about everything to get over it, but it just keeps coming back? Perhaps you thought you had got over it, only for the symptoms to return with a vengeance?

It’s three o'clock – you’re at work, struggling to focus during the afternoon lull. You gaze out of your office window, hoping for some relief, but instead you feel a headache coming on. Flat grey concrete lines the streets, while windows form repetitive glassy intervals in stark brick walls.

The study shows that people who sleep less than six hours a night have a 13% higher mortality rate than those sleeping at least seven hours.

"The idea that increased glucose uptake is a metabolic hallmark of cancer cells is deeply embedded in our thinking. It's the basis for how we diagnose cancer and manage its treatment in the clinic," says Gary Patti. Above: HeLa cells in culture.

The researchers believe depression, metabolic symptoms, and the risk of developing diabetes interact in a number of ways. In some cases, a vicious cycle may emerge with depression and metabolic risk factors aggravating one another.