1 H.H. Ang, T.H. Ngai, T.H. Tan, Effects of Eurycoma longifolia Jack on sexual qualities in middle aged male rats, Science Direct, Phytomedicine, Volume 10, Issues 6-7, 2003, Pages 590-593.
2 H. H. Ang, S. Ikeda and E. K. Gan, Evaluation of the potency activity of aphrodisiac in Eurycoma longifolia Jack, Wiley Online Library, Phytotherapy Research, Volume 15, Issue 5, pages 435-436, August 2001.
3 Jyoti Shah, Herbal Treatments for Erectile Dysfunction, Springer Berlin Heidelberg, Herbal Drugs: Ethnomedicine to Modern Medicine, 2009, pp 67-80.
4 H. H. ANG, and M. K. SIM, Effects of Eurycoma longifolia Jack on Penile Erection Index and Homosexual Mounting in Rats, Wiley Online Library, Pharmacy and Pharmacology Communications, Volume 3, Issue 2, pages 117-119, February 1997.
6 Our company (Sumatra Pasak Bumi), and this website, sell tongkat ali in various forms, as well as a few other herbals. We are a trading enterprise, not a medical clinic.