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RadiantLife HRx uses Low Level Laser Technology for hair rejuvenation by supplying pulsed 655 nm laser light energy to the scalp. Pulsed laser light energy promotes better cell activities and produces deeper laser light penetration compared to continuous wave. The laser light is able to penetrate about 8 mm into the scalp tissue, just beyond the hair bulb. The energy is absorbed on a cellular level and photo-biostimulation takes place. Blood circulation to the follicle area is also increased.
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A 1986 paper on LLLT by the International Laser Group Association states "..... it normalisers metabolism of tissues, improves blood cell nutrition, and assures a regular sebaceous secretion .... if we start from a normal quantity of hair bulbs per square cm of the various subjects involved, we can state that there was strengthening of hair bulbs ..... hair growth could be actually ascertained - also it being darker than before".