One group of third-year medical students has launched a signature campaign calling for food-energy labelling in fast food outlets.

The over-consumption of fast food has long been linked to obesity.

An organiser of the campaign, Cynthia Hui, says the current law on energy labelling has failed to cover a range of food products, in particular fast foods.

In a second campaign, another group of third-year medical students is petitioning for a law banning the display of tobacco products at points of sale.