i found this photo courtesy of Mark's Daily Apple. it's quite a claim, obviously, but aren't such claims meant to be accompanied by the standard "not verified by the FDA" language?
most likely this manufacturer is in violation. or are these claims blessed by the FDA?
update: I quickly found this page on the FDA site. Seems these claims are definitely not blessed by the FDA.
Carbohydrates raise your blood sugar the most. Cut back on these. For example bread, cereal, rice, and pasta.