Microcurrent disperses in the form of cell-damaging heat. The long-term effects of passing microcurrent through nerve and muscle rather than skin is unclear.
Near-infrared LED light does not penetrate the skin in the way that near-infrared laser light does. LED is unable to reach the deepest layers of the skin.
At home diode lasers (between 5 and 20 mW) are designed to focus on water, and the by-product of this is heat. As a result this induces the body's own repair response to bring about the production of collagen and repair the dermis.
Breakthrough ultra-diffused lens delivers targeted, controlled power through all the layers of the skin. It's 100x more effective than LED .