1.It has 100% natural herbal guarantee without any chemical additives and any medication hormone. 2.It is quick-acting and effective for adults to resume physical strength and energy, then they can have satisfied sexual function. It works in about 45 minutes, 60 minutes to its best. It works for about 12-24 hours and the erection could last about 2 hours. 3.It activates and repairs reproductive system and body atrophied cell so that maintains them to be vigorous. 4.Yunyuan Capsule has non-toxic and no any side-effect, which is diferent from other Viagra that has side-effect such as headache, facial flushing, upset stomach, temporary bluish vision , blurred vision or being sensitive to light etc. It does not make you more dependent upon it to get or maintain an erection. 5.Yunyuan capsule has been shown to work safely in men who have ED and other health issues such as high blood pressure, high cholesterol, heart disease, diabetes, prostate problems and depression and so on. It actually is suitable for all the adults leading to health fit since it is a sexual tonic and healthcare product. 6.Works for men as well as women.