Applying caffeine to the skin causes vasoconstriction (constriction with the blood vessels), which aids to reduce the level of blood that accumulates under the eyes (A significant component that contributes to dark circles). In addition, vasoconstriction can firm the skin due to the removing of extra fluids and doable stimulation https://oxygenconcentratorinogen33209.canariblogs.com/roc-face-cream-with-retinol-secrets-41944441