Let's look at the "interesting" part:
Int J Androl. 2009 Dec;32(6):629-36. Epub 2008 Aug 15.
Effect of aqueous extract of Bulbine natalensis (Baker) stem on the sexual behaviour of male rats.
Yakubu MT, Afolayan AJ.
Centre for Phytomedicine Research, Department of Botany, University of Fort Hare, Alice, South Africa.
The phytochemical constituents of aqueous extract of Bulbine natalensis (Baker) stem and its effect on male rat sexual behaviour were evaluated for 7 days. Phytochemical screening revealed the presence of saponins, cardiac glycoside, tannins, alkaloids and anthraquinones. Administration of the extract at the doses of 25 and 50 mg/kg body weight resulted in the significant increase (p < 0.05) in mount frequency, intromission frequency, ejaculatory latency, ejaculation frequency, serum testosterone and luteinizing hormone concentrations, computed indices of sexual behaviour, erection, quick flips, long flips and total penile reflexes whereas the mount latency, intromission latency and post-ejaculatory interval were significantly decreased (p < 0.05) throughout the experimental period. The 100 mg/kg body weight of the extract produced contrasting pattern to the lower doses of the extract in all the parameters of sexual behaviour monitored throughout the experimental period. The results are indicative of prosexual stimulatory potentials of Bulbine natalensis in male rats. The aqueous extract of Bulbine natalensis stem at these doses (25 and 50 mg/kg body weight) may be used in the management of disorders of desire/libido, premature ejaculation and erectile dysfunction in males.
PMID:18710410[PubMed - indexed for MEDLINE]
Now - according to this research done by the group giving Bulbine natalensis it's spotlight suggests 25 and 50 mg/kg aqueous extracts (mind you, no supplement on the market I am aware of uses to have benefit but not at 100mg/kg. If you look at the p value (p < 0.05); this is some statistical wizardry and not as significant results as I would like it. The researchers made the results look more "significant" than they really are (kind of like the saw palmetto + astaxanthin complex in the JISSN with a p value , 0.5 - Jesus, does anyone know how to read research in the formulation part of the industry?). Still, taken outside of this solitary study...(see next post)...