FoLix regrows hair by creating thousands of microscopic columns of controlled heat deep in the scalp, which triggers your body's natural healing and follicle-regeneration response. That response reactivates dormant follicles and pushes them back into their active growth phase, so you grow thicker hair from follicles you already have. It does all of this without surgery, medication, or downtime, because the outer layer of skin stays intact the entire time.
How does FoLix stimulate hair growth?
FoLix uses a fractional laser to deliver tiny, separated beams of energy into the scalp, each one creating a controlled micro-zone of coagulation. Your body reads these micro-zones as something to repair, and that repair process is where the regrowth happens. The healing cascade releases inflammatory mediators, activates fibroblasts, and upregulates the cytokines and follicle-regeneration factors involved in building new hair.
In preclinical research, this process was linked to overexpression of Sonic Hedgehog, a signaling pathway that is essential to hair follicle development. In other words, FoLix appears to switch back on some of the same biological signals your scalp used to grow hair more vigorously when you were younger. The end result is that follicles sitting in a resting state are nudged back into anagen, the active growth phase.
What is a non-ablative fractional laser?
A non-ablative fractional laser treats tissue under the skin while leaving the surface intact, in many small separated zones rather than across the whole surface. Two ideas matter here.
Non-ablative means the laser does not vaporize or remove the outer layer of skin. There is no open wound, which is why there is no infection risk and no recovery period. Fractional means the energy is delivered in a grid of microscopic points, sparing the healthy tissue in between. Because untreated tissue surrounds every treated column, healing is fast and the scalp recovers quickly. This is the same principle that made fractional lasers a breakthrough for skin rejuvenation, now engineered specifically for the follicles in the scalp.
How deep does the FoLix laser reach?
FoLix reaches up to 550 microns deep, into the mid-reticular dermis where hair follicles are anchored. To get there safely, it uses a 1565nm near-infrared wavelength whose primary target is water in the tissue rather than melanin or blood. That distinction is important: because it is not chasing pigment, it can travel to follicle depth without overheating the surface or causing the pigment changes that pigment-targeting lasers can in some skin types. This is also why FoLix is cleared for Fitzpatrick skin types I to IV.
The device delivers this energy through a precise scanning pattern that covers the scalp evenly in a single pass, paired with a cooled sapphire tip that keeps the surface comfortable throughout.
Does FoLix damage the scalp?
No. FoLix is engineered to stimulate follicles, not destroy them, and the micro-injuries it creates are deliberately controlled to trigger regeneration rather than harm. Because the outer skin layer remains intact, there is no open wound and no infection risk associated with ablative procedures. The FDA registration study of 98 patients reported zero adverse events, and pain scores averaged around 2 out of 10.
There are normal, temporary healing reactions: mild redness or slight swelling that usually fades within a day or two, and in the first session or two some patients notice brief shedding of weaker hairs before stronger hair grows in. These are signs the process is working, not signs of damage. You can read the full picture in our guide to FoLix side effects and safety.
How FoLix is different from laser hair removal
It is a common point of confusion, so it is worth being clear: FoLix and laser hair removal do opposite things. Laser hair removal targets the pigment in a follicle to disable future growth. FoLix uses a different wavelength and mechanism to revive follicles and encourage hair to grow. They are different lasers used for opposite goals.
Why the mechanism matters for your results
Because FoLix works with your follicle's natural growth cycle, results build over time rather than appearing overnight, and the treatment works best when there are still living follicles to revive. That is why timing and candidacy matter, and why early to mid-stage hair loss responds best. To see how that timeline unfolds, read the FoLix results timeline, and to understand the bigger picture of what is causing your hair loss in the first place.
This article is educational and not a substitute for personalized medical advice.