According to the program "Dispatches: do you know what's in your breakfast?" which is scheduled to be aired on Monday, a 30g serving of Kellogg's Frosties contained more sugar levels than a Tesco jam doughnut.
While the jam doughnut contained 8.6g of sugar, Frosties accounted for 11.1g of sugar while other famous brands such as Nestle's Honey Cheerios and Kellogg's Coco Pops 10.53g and 10.2g of sugar.
One of the most famous brands of cornflakes marketed by Kellogg's had salt levels which were higher than Walkers Ready Salted crisps.
Calling for uniformity in labeling products, British Heart Foundation's policy manager Mubeen Bhutta said, "We want to see a single labeling system introduced across all foods so that parents can make informed choices about what they are buying. I think parents would be very surprised that cereals, often advertised as having health benefits, contain more sugar than a doughnut."
While the charity foundation accused cereal manufacturers of duping the consumers by claiming that their products were healthy, Kellogg's joined hands with their counterparts by dismissing the report by stating that their cereals contained far less sugar levels that other sweets.
"The reality is a single serving of Frosties or Coco Pops has the same amount of sugar in it as glass of orange juice or a banana. It's important to remember that a doughnut contains around 14 times the level of fat as a single bowl of Frosties", a Kellogg's spokesman revealed.