Chamaecostus cuspidatus (syn. Costus igneus), commonly known as Insulin Plant or Fiery Costus, is a perennial herb in the Costaceae family. The name Chamaecostus derives from Greek chamai ("on the ground") and Costus (the genus name for spiral gingers), while cuspidatus means "pointed," referring to its leaf tips. Traditionally, it was grown ornamentally for its spiraling stems and orange flowers. It is native to Central and South America and later introduced to India and Southeast Asia. In India, where it gained prominence in the 20th century, it became widely used in folk medicine for managing diabetes, giving rise to the popular name "Insulin Plant."

Historically in the Americas, the plant was primarily decorative, but indigenous groups are thought to have used its leaves in herbal remedies for digestive issues and infections. In modern ethnomedicine, especially in southern India, the leaves are chewed fresh or made into powders and teas as a hypoglycemic treatment for type 2 diabetes. Beyond this, the plant has been explored for its potential antioxidant, antimicrobial, and anti-inflammatory properties, and in some places, leaves are cooked or infused as a functional food.