... and it could lead into hypoderma fast and efficiently, absorbed by cell, generate the most efficient photochemical ... which inhibits the increase of collagen, and that is why when laser/IPL/RF treat to ... treatment, the effect is still the same as before. LED cold light does not produce thermal effect, and ... dry skin6,Improve adverse metabolic cycle of poor color gray skin anddull skin 7,Eliminate fatigue, ...