I looked up some information about the effectiveness.
Noni is known to have many phytochemical components that prevent inflammation within blood vessels, making it effective for anti-inflammatory purposes. Additionally, the powerful antioxidant compound damnacanthal found in noni's fruit and roots plays a crucial role in inhibiting the formation and proliferation of cancer cells. However, since noni has a high potassium content, caution is advised when consuming it if you have kidney problems.
Meanwhile, Noni has been used as medicine for its fruits, leaves, roots, stems, and seeds in various regions including China, Hawaii, and Tahiti since ancient times, and in Indonesia and Hawaii, the shells and roots of Noni are used for traditional dyeing.
Naver Knowledge EncyclopediaNoni(Current Affairs Dictionary, PMG Knowledge Engine Research Institute)