FOOD giant Kellogg's was today ordered to change the advertising for its top-selling Frosties breakfast cereal after the product was branded "high in sugar".

The Advertising Standards Authority (ASA) launched an investigation after a complaint about a football-themed commercial for Frosties that included the slogan "train hard, eat right and earn your stripes".

The watchdog studied information supplied by Kellogg's and found a 30g bowl of Frosties with 125ml of milk contained more sugar than a jam doughnut, a custard tart or a flapjack.

It ruled that the commercial's use of the claim "eat right" misleadingly implied the product was healthy when the sugar content - 12g per 30g serving - suggested otherwise.

Kellogg's was told not to include the claim in future adverts for Frosties.