Die hard Moisturizing repair serum with Spider Fiber Protein 0.6g x 60ea Die hard is a moisturizing repair serum, composed with genetically engineered growth factor protein named r-Spider Fiber Protein, which is 18 times stronger than steel that replaces collagen and elastin to improve skin elasticity and triggers cell division. It contains: vital complex(21 kinds of essential amino acids, and 10 kinds of minerals), Adenosine(Certified by KFDA) and sh-Oligopeptide-1(EGF). By excluding plant extracts with uncertain ingredients and/or effects, the possibilities of side effects has reduced by far.