Andrew Huberman· PhD
So by shining red light or near-infrared light on a localized patch of skin, provided that red light is not of such high intensity that it burns the skin, but is of sufficient intensity that it provides just a little bit of damage to the upper layers of the skin, the epidermis, and that it triggers certain biological pathways within the cells of the sebaceous gland and the stem cells within the hair cell niche and the stem cells in skin, what happens is the top layers of the skin are basically burned off by a very low level of burn and/or the cells in the deeper layer start to churn out new cells, which go and rescue the lesion, essentially clear out the lesion and replace that lesion with healthy skin cells.