Evid Based Complement Alternat Med. 2012;2012:487423.
Morinda citrifolia (Noni) Juice Augments Mammary Gland Differentiation and Reduces Mammary Tumor Growth in Mice Expressing the Unactivated c-erbB2 Transgene.
Clafshenkel WP, King TL, Kotlarczyk MP, Cline JM, Foster WG, Davis VL, Witt-Enderby PA.

Mammary tumor latency, incidence, multiplicity, and metastatic incidence in female mice were unaffected by TNJ treatment, indicating that it does not increase or decrease breast cancer risk in women taking TNJ for other benefits. As TNJ did reduce tumor weight and volume, it may help enhance treatment responses in women with existing HER2/neu breast cancer. TNJ is able to inhibit the growth of this aggressive cancer at a remarkably low human equivalent dose. (original abstract available at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3351229/).