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" ... Why are laser treatments the most effective treatment for acne scars? They produce the most amount of neocollagensis (stimulation of new collagen and elastin, which is required to remodel acne scars). One of the only ways to stimulate collagen is to damage the skin to elicit a wound-healing response. Lasers use light energy to create these small wounds. That said, not all lasers are creating equal or powerful enough to wound the skin appropriately. ... "