J Biochem Mol Toxicol. 2007;21(5):231-42.
Endothelial cytoprotection from oxidized LDL by some crude Melanesian plant extracts is not related to their antioxidant capacity.
Owen PL, Matainaho T, Sirois M, Johns T.

Noni root extract delayed LDL oxidation in vitro.  Noni fruit, juice and leaf extract
prevented an oxLDL-mediated increase in intracellular aldehyde generation. (original abstract available at https://www.ncbi.nlm.nih.gov/pubmed/17912700).