endorphin

The role of endorphins in memory is not yet certain.

Those endorphins clear the mind, which is one reason why people work better after they've taken some exercise.

Four types of endorphins are created in the human body.

For example, in some studies a drug was given to people which blocked the effect of endorphins.

Giving those old endorphins a little too much free rein?

I know it's just endorphins at work, but it was welcome anyway.

The brooder would be full of endorphins, to start with.

It wasn't real; just a side effect of the endorphins still in his blood.

The whole universe, and this isn't just the endorphins talking.

Maybe this was all a matter of adrenalin and endorphins.

And at least when I'm doing it, there's the endorphins to dull the pain.

Endorphins in the blood were measured before and after each treadmill run.

Chocolate actually releases endorphins into your body that give you a natural high.

The endorphins took a long time to kick in - perhaps after a year of regular exercise.

Is he paying for the endorphins that you're putting in your veins?

Right now they're flush with victory, high on relief and endorphins.

Those good old endorphins are finally kicking in, and all at once this seems plausible.

She went too quickly through her supply of endorphins and serotonin.

No one, including them, has since been able to figure out how to turn endorphins into the "bee without a sting."

Endorphins used to be something I thought were invented to persuade people to exercise.

The human body also has a chemical response to pain, by releasing endorphins.

By the first hundred paces, he started to feel the flush of his endorphins.

"I understand loving the feeling you get after working out - all those endorphins.

And there's nothing like it when those endorphins kick in."