
Often added as a finish after laser treatment.
Fine needles create very small channels densely across the skin surface, then an agent is applied so it can absorb. It is a way to get ingredients that do not penetrate well on their own into the skin. The needling itself also triggers some healing response.
MTS creates micro-channels with fine needles so topical agents can absorb into the skin. Fine needles create many tiny channels in the surface, and the substance is then applied to soak in. It must be applied before the channels close, so the order of steps affects the result.