A graphic advertising campaign highlighting the dangers of being overweight or obese appears to be striking a chord with Canberrans, with more than 600 people signing up for meal and activity plans.

More than 3500 Canberrans have visited the LiveLighter website since the confronting campaign was launched last month.

Gut feeling: The LiveLighter campaign has motivated hundreds of Canberrans.

The campaign, funded by the Heart Foundation ACT and the ACT government, takes people inside the human body and shows the damage that an unhealthy weight, poor diet and physical inactivity can cause to internal organs.

It features confronting images of "grabbable" guts and toxic fat.