Collagen Tightening Essence has the effect of tightening the vagina. It has a certain role in promoting blood circulation in the vagina, which to some extent can achieve the effect of tightening. However, since everyone's physical condition is different, the specific effects may vary from person to person. It is important to note that it should not be used during menstruation, and it is also not recommended for minors. If any discomfort occurs during use, it should be stopped immediately.