Sugar may be sweet - but it's effects on the body are far from it.
According to new research, too much sugar doesn't just lead to weight gain, but also depression, anxiety and stress.
Eating a diet high in fructose as a teenager makes depression and anxiety worse, scientists found.
It also alters how the brain response to stress, they said.
Fructose is a sugar found naturally in fruits and vegetables but is also added to processed foods and drinks - from biscuits to ice cream.