Low-Level Laser Therapy Overview
Clinical evidence and application of photobiomodulation in hair restoration.
AI Summary: LLLT Overview
Q: What is Low-Level Laser Therapy (LLLT)?
LLLT stimulates cellular activity in hair follicles. It is an adjunctive therapy that may support graft survival when used post-operatively and modestly improve hair density in Androgenetic Alopecia.
Mechanism of Action
- Mitochondrial stimulation: Photons absorbed by cytochrome c oxidase increase ATP production.
- Enhanced microcirculation: Promotes vasodilation, increasing blood flow to follicles.
- Inflammation modulation: May reduce pro-inflammatory cytokines.
- Extended anagen phase: May prolong active growth period of the hair cycle.
Post-Operative Application
Potential Benefits (Days 1–7)
- Inflammation reduction: May decrease post-surgical redness and swelling.
- Graft support: May improve microcirculation during the anchoring phase.
- Shock loss mitigation: May minimize temporary shedding of surrounding native hair.
Clinical Protocol
Post-operative LLLT typically involves short, controlled sessions starting 24–48 hours after the procedure. This is an adjunctive therapy, not a substitute for standard aftercare.
Clinical Considerations
Dose Response
LLLT follows a biphasic dose response — insufficient or excessive energy may not produce optimal results.
Device Quality
Effective LLLT requires appropriate wavelength (650–670 nm) and sufficient power density. Not all devices are equivalent.
Cannot Revive Dead Follicles
LLLT cannot revive completely fibrosed follicles. It is an adjunct to, not a replacement for, medical or surgical treatment.
Consistency Required
Benefits are transient. Discontinuation typically leads to reversal of any gains.