Cistanches is another important sex tonic that has been used by men throughout Chinese history. Ancient sexual classics claimed that consistent consumption of Cistanches would enlarge the penis. It is also said to make the penis much harder during erection. Cistanches is now known to contain alkaloids that increase blood circulation to the pelvic region in general and to the genitals in particular

The highly regarded tenth century imperial manual on health and sexual conduct, The Essence of Medical Prescriptions, compiled by a Chinese physician living in Japan by the name of Tamba Yasuyori, described numerous formulations that would enhance male potency. Cistanches was included in 80% of these formulas. The ancient classics indicate that Cistanches increases both the flow of Yang energy and blood flow to the genitals.

Youthfulness is very much associated with sexual vigor, whether or not one uses this sexual vigor sexually, or converts the energy to other creative outlets. When the Kidney Yin and Yang are strong, a person can flourish. They will be full of energy, high in spirit, creative, and strong minded. They will appear radiantly healthy to others and will be attractive to the opposite sex.

Cistanches has a secondary benefit, in that it improves the function of the bowels, resulting in healthy bowel movements. This is a result of increased Qi in the Large Intestine.

Cistanches contains minute amounts of alkaloids and neutral crystalline substances.