Proposed government guidelines recommend that cereals have no more than 26% added sugar by weight, according to the report, and the Environmental Working Group found that many popular cereals, including Froot Loops, Cap'n Crunch and Honey Smacks, had more than 40% added sugar.
"Our children deserve better," Rep. Rosa DeLauro, D-Connecticut, said in a press release issued by the Environmental Working Group.
The proposed recommendations are voluntary and not legally binding on food manufacturers. They were designed to help children slim down, because one out of three children in the United States is either overweight or obese, according to the Centers for Disease Control.
According to the report, a cup of some cereals has more sugar than a Twinkie or three Chips Ahoy! chocolate chip cookies.
Image: Bowl of fruity cereal, via Shutterstock.