Uncle Sam is an American brand of ready-to eat breakfast cereal that was first introduced in 1908 by U.S. Mills of Omaha, Nebraska.

This high-fiber, ready-to-eat cereal has a low glycemic index and has an exceptionally high amount of omega-3 per serving because of the flaxseed.

[8] In 1910, the United States Department of Agriculture Bureau of Chemistry (a precursor of the FDA) sued Uncle Sam for "misinforming customers about the cereal’s health values" in advertisements.

Following the suit, "Uncle Sam focused on simply relieving constipation instead of the array of health issues they wanted to address.

[5] In 1968, "the Uncle Sam plant was attacked by vandals in May 1968, with more than 50 windows smashed early on a Saturday morning.