Corn starch powder is a fine white powder made from corn, which is a cereal grain that has been cultivated for thousands of years in the Americas. It was first used as a food ingredient in the 19th century and has since become a common ingredient in many processed foods.  In Ayurvedic medicine, corn starch powder is sometimes used externally as a cooling and soothing agent for skin irritations and rashes. However, it is not a commonly used ingredient in Ayurvedic remedies.