What are the other 10% doing?
When you're feeling a little down, tired or worn out, what's your go-to for a pick me up?
It might be calling that perky friend for a chat, heading out for a walk - or it could be simply food.
And a new survey has found that plenty of us think food is the perfect way to lighten our mood.
Health brand Yakult has found that 90% of people in Ireland now use food to boost their mood.
So what types of food are top of the list for people?
Milk chocolate and coffee topped the list - no surprise.
They were followed closely by biscuits and ice-cream.
Dr. Mary McCreey says scientific research has revealed a strong link between our gut and brain.
"Certain foods that we eat can produce in the gut the good, happy, feel-good hormone called serotonin," she says.
"It's believed that 90% of our serotonin is produced in the gut in relation to the type of foods we eat in our diet," she adds.