Since a long time, the Polynesian cultures have been harnessing the benefits of the noni plant for treating common problems like bowel irregularities, liver diseases, urinary tract infection and menstrual cramps. Benefits are chiefly derived by using the roots, leaves, bark and fruits of the noni plant. Noni juice, powder and capsules are the popular ways to include it in your health regimen. There are many beauty products also that have noni as an ingredient.