Why do meats not test positive for starch?

Meats do not test positive for starch because starch is a carbohydrate primarily found in plant-based foods, such as grains, fruits, and vegetables. Starch is a polysaccharide made up of glucose units, while meats are composed mainly of proteins and fats. During testing, reagents like iodine, which is used to detect starch, do not react with the proteins and lipids in meat, resulting in a negative test for starch.