a rodent study performed by the Centre for Phytomedicine Research, Department of Botany, University of Fort Hare, Alice, South Africa found that rodents receiving Bulbine Natalensis water extract had on average a Serum Testosterone level equal to 347% of the control group that did not receive Bulbine, and that their Estrogen levels were 35% lower. A recent non-clinical study showed that a 36 year old male weighing 75 kilograms over a two week period taking 360 milligrams of 5:1 Bulbine Natalensis cold water extract increased his total and free Testosterone levels by 35.5%. The study linked to below found that Bulbine substantially increased the libido of male rats.
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