Two years at most, although the box usually says three years. You know, the best service life of the active ingredients in the essence is only half a year after leaving the factory.

The essence will oxidize. However, even so, you will still see some effects after using the essence for more than two years, but the speed of taking effect and the effect of maintenance are not as good as those of newer products.

Vacuum sealing the press, bottle mouth and light-proof bottle body can prevent the sun and oxygen from damaging sensitive components, such as vitamin C and collagen. The dropper type is inspired by the laboratory. The dosage of the dropper can be accurately controlled, as long as the tip of the dropper does not touch the skin to avoid cross-contamination.