Interesting article discussing Chinese herbs used as aphrodisiacs:

"For centuries the Chinese have associated vibrant health and longevity with both abundant kidney Qi and strong libido. In Chinese medicine your kidney Qi and Essence direct your sexual development and keep your libido healthy; improving the health of your kidneys often means increasing the health of your libido. Some of the most expensive and sought-after kidney-supportive Chinese herbal formulas have become known as aphrodisiacs; they enhance sex drive and performance because they build kidney yin, kidney yang, and kidney Essence.

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Chinese ginseng is a powerful herb for strengthening your Qi and helping your body adapt to stress. It is used as a sexual tonic because of its modulating effects on your nervous system. If you are lethargic it can give you sexual energy, and if you are tense it can help you relax. Chinese ginseng contains compounds that may have effects on your body resembling those of certain sex and adrenal hormones. It does not act as an immediate sexual stimulant, but when taken long-term it can enhance your sexual vitality. It is usually used in combination with other herbal aphrodisiacs to increase sexual potency, kidney yang, and kidney Essence."