Ginsenoside Rg1 is one of the active ingredients in ginseng, a popular sex supplement. Researchers from the Chinese Academy of Medical Sciences found that Rg1 was a powerful sexual stimulant in mice. Rg1 increased mounting and pelvic thrusting by 20 percent. It also increased blood testosterone, nitric oxide (important for increasing blood flow), and nerve stimulation to the penis.
Ginsenoside Rg1 may be an effective component in sex supplements. The supplement works like the prescription drug Viagra to increase blood flow to the penis. These results may not apply to humans.
Source: Journal of Sexual Medicine, 7:743-750, 2010