Andrew Huberman· PhD
But it turns out that low levels of inflammation caused by things like micro-needling or PRP injections or even the introduction of any kind of fluid. For instance, saline fluid injected into a region can cause changes in the cells in that region, causing, for instance, stem cell populations that were waning to reactivate again, causing telogen phase follicles that have melanocytes and stem cells that are dying off but not completely gone to reenter the cell cycle.