Conclusions
The present study demonstrated that JC and JCH could protect damages induced by UV radiation.
The protective effects were evaluated by quantitative analysis of photoaging index, including skin antioxidant indicators, lipid, and total ceramide of skin, collagen, and glycosaminoglycan.
The action mechanisms of JC and JCH mainly involved the antioxidative properties and the repairing of the endogenous collagen synthesis in vivo. JCH showed much higher bioactivities than JC. Therefore, diets and nutrients enriched with JCH may be beneficial for people to decrease UV-damages to
skin.