REVIAN RED is indicated for use on Fitzpatrick Skin Types I-IV because that is historically all that has been cleared by the FDA in regards to red light therapy and hair loss. REVIAN's Ph.D. scientists tested REVIAN LEDs on dark tone skin type VI and the light fully penetrated the skin at levels comparable to Caucasian skin. There is no biological difference in the skin of different types as to how they react to the light or activate the renewal of the cells.
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