Whether it's hot chocolate or iced coffee, the temperature of drinks — and when you drink them — may influence your mood, according to researchers. A new study, published in the British Journal of ...

People who regularly consume caffeine are usually in a better mood after a cup of coffee or another caffeinated drink—an effect that is much more pronounced in the morning than later in the day. This ...

Researchers at the University of Michigan found that sleep and circadian rhythms play a key role in mental health. While the findings aren't new, they have previously only been demonstrated in small ...

Exposure to air pollution is fueling fluctuations in mood among many Americans, but precisely how these emotional responses take shape varies greatly from individual to individual, a new study has ...