Noni is a small evergreen tree in the Pacific Islands, Australia, Southeast Asia and India that often grows among lava flows. Noni is used to make a red or yellow dye for clothing. It was also used as medicine, which can be applied to the skin. Noni fruit, leaves, flowers, stems, bark, and roots are used to make medicine. However, the effectiveness of noni for these uses has not been proven. Noni including potassium contains many substances,. Some of these substances might help repair damaged cells in the body, activate the immune system, and have other activities.