Pick a ripe fruit that is off-whitish, with no green, and hasn't turned brownish, and is slightly mushy when you press your thumb into the fruit. Wash the whole fruit, and put it in a blender. Run it on "puree" for 30 or 40 seconds. First thing in the morning, take one or two tablespoons straight up, and then don't eat your breakfast or drink juice for a half-hour. (Other food will reduce the action of the noni). And yes, it is normal to feel like urping it up a few minutes after taking it - don't worry.
Yes, it tastes horrible. Yes, commercial sellers mix it with things like cranberry, etc but that is marketing to get it sold to folks who agree that it tastes badddd.
AND, if you sprain an ankle, immediately wrap two newer large green noni tree leaves, shiny side on the skin around your ankle. The swelling will stop and advance no further, and the ankle will also heal faster.......
AND, if you have a fever, press and hold one or two newer large green noni tree leaves, shiny side on your forehead for 20 minutes, and the fever will break shortly afterwards.......