Arrowroot powder is a natural starch powder. Yes, just like the cornstarch your grandmother would have mentioned on a summer visit. The use of arrowroot powder aids in absorbing some moisture that accumulates on the skin. It soothes inflammation of the skin, including rashes and skin sores. Additionally, it has healthy minerals and vitamins like B6, iron, zinc, and potassium. Who wouldn't want to gain from those advantages?