Rembo Premium Eyelash Serum contains two types of human stem cells: human adipose-derived stem cells*2 and human umbilical cord blood stem cells*1. *1 Human umbilical cord blood cell-conditioned culture medium: This human-derived ingredient is expected to support skin condition. While there are many different types of stem cell culture medium, those derived from young cells are said to be particularly well-suited for maintaining skin firmness and radiance. Culture medium containing growth factors tends to support skin moisture the more concentrated it is. Human-derived stem cells, safely cultivated from fetal umbilical cord blood, are highly compatible with skin and can be used in daily skincare. *2 Human adipose-derived stem cell-conditioned culture medium: Human adipose-derived stem cell culture medium is lipid-derived and therefore poorly soluble in water. Because the human body contains a high amount of water, non-water-soluble stem cells may not blend well with the skin. On the other hand, human umbilical cord blood cell-conditioned culture medium is highly water-soluble, allowing it to easily penetrate the skin and supporting skin moisture and firmness in daily skincare. The formula developer believes that combining these two active ingredients will produce a synergistic effect. A beauty ingredient designed to give eyelashes volume and strength. Daily care helps create a striking eye look. It blends easily with eyelashes and eyebrows that tend to dry out, and is recommended for those seeking a soft, natural finish. -------------Regarding the use of eyelash serum products, the National Consumer Affairs Center of Japan issued a warning on August 8, 2019. Please read the instructions carefully before use to ensure safe and appropriate use. -------------