Yes, this was true. It is said that Osman dreamed about a tree growing out of his chest reaching to all those 3 continents. He relied to his Shaykh on what this meant, and his Shaykh told him it was a sign from his predecessors.
Overweight children or children who eat excessive amounts of sugary foods and fatty acids might feel discouraged or embarrassed to pick unhealthy options, instead referring to the healthier options to avoid social conflict.