As you may have noticed from the 'woohoo' feelings you get after a mocha, caffeine temporarily increases serotonin levels.
The Sun
Reduce alcohol intake and go for a brisk 30-minute walk a day, which helps raise serotonin levels.
The Sun
He mutters something about aerobic conditioning, muscle tone and serotonin levels.
Times, Sunday Times
Carbs can be calming because they raise mood-boosting serotonin levels.
The Sun
When we eat carb-rich foods, serotonin levels quickly rise then crash, sending us to the bread bin again.
The Sun