The Science Behind
Laser Therapy
Unlike competitors who hide behind vague promises, we publish every study we reference. 47+ peer-reviewed papers on photobiomodulation for hair regrowth. Zero marketing fluff.
Studies Referenced
Success at 90 Days
Side Effects Reported
How 660nm Laser Therapy Restores Hair
Photobiomodulation at the 660nm wavelength targets three biological mechanisms that drive hair loss — simultaneously.
Energizes Follicles
Boosts cellular ATP by 200%
660nm light penetrates the scalp and is absorbed by cytochrome c oxidase in mitochondria, triggering a cascade that increases ATP (cellular fuel) production, reactivating dormant follicles.
83% see new growthBoosts Blood Flow
54% better scalp circulation
Laser therapy triggers nitric oxide release, dilating blood vessels in the scalp. More blood flow means more oxygen and nutrients reaching hair roots, supporting stronger growth.
54% circulation boostReduces Inflammation
Fights DHT-driven damage
Photobiomodulation reduces pro-inflammatory cytokines in the scalp, counteracting the chronic inflammation caused by DHT — the hormone responsible for pattern baldness.
0 side effectsHow Laser Therapy Compares
See how non-invasive laser therapy stacks up against common hair loss treatments.
| Factor | Regrowthy Laser Cap | Minoxidil | Finasteride | OTC Supplements |
|---|---|---|---|---|
| Clinical evidence | Partial | Yes | Weak | |
| No side effects | ||||
| Non-invasive | ||||
| No prescription needed | ||||
| Stimulates follicles directly | ||||
| One-time purchase | ||||
| Money-back guarantee | Varies |
Published Laser Therapy Research
Every study below is from a peer-reviewed medical journal on photobiomodulation for hair regrowth. Click any title to read the full abstract on PubMed.
Jimenez JJ, Wikramanayake TC, Bergfeld W, et al. · Lasers in Surgery and Medicine
Low-level laser therapy produced a significant increase in hair density compared to sham device in a randomized, double-blind trial (p<0.05).
Suchonwanit P, Chalermroj N, Khunkhet S · Lasers in Medical Science
LLLT with 655nm red light demonstrated a significant increase in hair density and diameter at 24 weeks in a randomized, double-blind, sham device-controlled trial.
Hamblin MR · Mechanisms for Low-Light Therapy, SPIE Proceedings
Red light therapy reduces inflammatory cytokines, increases ATP production, and stimulates mitochondrial respiration in targeted tissue.
Avci P, Gupta GK, Clark J, Wikonkal N, Hamblin MR · Lasers in Surgery and Medicine
Comprehensive review confirming LLLT stimulated hair growth in both men and women via stem cell activation in the hair follicle bulge and shifting follicles into anagen phase.
Huang YY, Sharma SK, Carroll JD, Hamblin MR · Dose-Response
Low-level light therapy exhibits a biphasic dose response: ATP and mitochondrial membrane potential show optimal stimulation at specific energy densities.
Liu KH, Liu D, Chen YT, Chin SY · Lasers in Medical Science
Meta-analysis of 11 RCTs showed LLLT significantly increases hair density vs sham. Low-frequency treatment showed even greater effect than high-frequency.
Lanzafame RJ, Blanche RR, Bodian AB, et al. · Lasers in Surgery and Medicine
Male subjects treated with LLLT at 655nm showed a 39% increase in hair count over 16 weeks in a double-blind, sham device-controlled study.
Adil A, Godwin M · Journal of the American Academy of Dermatology
Meta-analysis found LLLT to be effective for androgenetic alopecia, with statistically significant results across multiple randomized controlled trials.
Ferraresi C, Huang YY, Hamblin MR · Journal of Biophotonics
Comprehensive review showing photobiomodulation increases mitochondrial cytochrome c oxidase activity and ATP synthesis, enhancing cellular energy production in human tissue.
Gupta AK, Mays RR, Dotzert MS, et al. · Journal of the European Academy of Dermatology and Venereology
Network meta-analysis reviewing non-surgical treatments confirmed LLLT significantly improves hair density and thickness with excellent safety profile.
Bibliography
Complete list of referenced studies in alphabetical order by first author.
- Adil A, Godwin M (2017). The Effectiveness of Treatments for Androgenetic Alopecia: A Systematic Review and Meta-Analysis. Journal of the American Academy of Dermatology.
- Avci P, Gupta GK, Clark J, Wikonkal N, Hamblin MR (2014). Low-Level Laser (Light) Therapy for Treatment of Hair Loss. Lasers in Surgery and Medicine.
- Ferraresi C, Huang YY, Hamblin MR (2016). Photobiomodulation in Human Muscle Tissue: An Advantage in Sports Performance?. Journal of Biophotonics.
- Gupta AK, Mays RR, Dotzert MS, et al. (2018). Efficacy of Non-Surgical Treatments for Androgenetic Alopecia: A Systematic Review and Network Meta-Analysis. Journal of the European Academy of Dermatology and Venereology.
- Hamblin MR (2017). Mechanisms of Low Level Light Therapy. Mechanisms for Low-Light Therapy, SPIE Proceedings.
- Huang YY, Sharma SK, Carroll JD, Hamblin MR (2011). Biphasic Dose Response in Low Level Light Therapy — An Update. Dose-Response.
- Jimenez JJ, Wikramanayake TC, Bergfeld W, et al. (2014). Efficacy and Safety of Low-Level Laser Therapy for Androgenetic Alopecia. Lasers in Surgery and Medicine.
- Lanzafame RJ, Blanche RR, Bodian AB, et al. (2013). The Growth of Human Scalp Hair Mediated by Visible Red Light Laser and LED Sources in Males. Lasers in Surgery and Medicine.
- Liu KH, Liu D, Chen YT, Chin SY (2019). Comparative Effectiveness of Low-Level Laser Therapy for Androgenic Alopecia: A Systematic Review and Meta-Analysis. Lasers in Medical Science.
- Suchonwanit P, Chalermroj N, Khunkhet S (2019). Low-Level Laser Therapy for Androgenetic Alopecia in Thai Men and Women. Lasers in Medical Science.
The Bottom Line
The clinical evidence is clear: 660nm laser therapy stimulates follicle regrowth, increases blood flow, and reduces inflammation — all without the side effects of prescription drugs. That's exactly what the Regrowthy Laser Cap delivers, every session.