J Diet Suppl. 2008;5(4):373-82.
Pharmacokinetic study of Noni fruit extract.
Issell BF, Franke A, Fielding RM.

Using scopoletin as a marker for noni absorption, the bioavailability of noni was measured in human volunteers at doses of 1,500 mg, 2,000 mg and 2,500 mg of freeze-dried noni fruit. Scopoletin rapidly enters the blood after noni fruit ingestion and maintains detectable levels for at least 8 hours.  (view original abstract at https://www.ncbi.nlm.nih.gov/pubmed/22436097)