Despite severe trauma in captivity, returning hostages may appear healthy due to hormonal surges that temporarily boost mood ...

The surge of neurochemicals during orgasm mirrors those that influence many daily processes-but in overdrive. The brain's ...

Scientists point to a lack of certain brain chemicals as a key player when it comes to sticking to those fitness resolutions ...

L-tyrosine is made in the body from another amino acid called phenylalanine. Then, your body uses tyrosine to make three ...