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How does low-level laser therapy (LLLT) treat hair loss?

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We're not sure exactly how this safe type of light therapy works to put the brakes on hair loss. It may encourage more hair follicles to grow, speed up how fast cells reproduce, or improve how well cells work.

Low-level lasers don't get hot, hurt, or burn tissue. What they do is boost blood flow to your hair roots, bringing nutrients and energy that your hair needs to grow.

You can get laser hair treatments in your doctor's office or do them at home, using a laser comb, headband, or a small helmet that fits under a baseball cap.

From: Nonsurgical Hair Loss Treatments WebMD Medical Reference

SOURCES:

UptoDate: "Patient education: Hair loss in men and women (androgenetic alopecia) (Beyond the Basics)."

OrthoInfo: "Platelet-Rich Plasma (PRP)."

Journal of Cutaneous and Aesthetic Surgery : "Study of Platelet-Rich Plasma Injections in the Treatment of Androgenetic Alopecia Through a One-Year Period."

Journal of Cosmetic Dermatology : "Platelet-rich plasma for androgenetic alopecia. Does it work? Evidence from meta-analysis."

Journal of Dermatological Treatment : "Meta-analysis of efficacy of platelet-rich plasma therapy for androgenetic alopecia."

PM&R : "Role of Low-Level Laser Therapy in Neurorehabilitation."

DermNet New Zealand: "Low dose laser therapy for hair loss."

American Journal of Clinical Dermatology : "Efficacy and Safety of a Low-level Laser Device in the Treatment of Male and Female Pattern Hair Loss: A Multicenter, Randomized, Sham Device-controlled, Double-blind Study."

Shelly Friedman, DO, Scottsdale Institute of Cosmetic Dermatology, Scottsdale, AZ.

Reviewed by Michael W. Smith on December 06, 2017

SOURCES:

UptoDate: "Patient education: Hair loss in men and women (androgenetic alopecia) (Beyond the Basics)."

OrthoInfo: "Platelet-Rich Plasma (PRP)."

Journal of Cutaneous and Aesthetic Surgery : "Study of Platelet-Rich Plasma Injections in the Treatment of Androgenetic Alopecia Through a One-Year Period."

Journal of Cosmetic Dermatology : "Platelet-rich plasma for androgenetic alopecia. Does it work? Evidence from meta-analysis."

Journal of Dermatological Treatment : "Meta-analysis of efficacy of platelet-rich plasma therapy for androgenetic alopecia."

PM&R : "Role of Low-Level Laser Therapy in Neurorehabilitation."

DermNet New Zealand: "Low dose laser therapy for hair loss."

American Journal of Clinical Dermatology : "Efficacy and Safety of a Low-level Laser Device in the Treatment of Male and Female Pattern Hair Loss: A Multicenter, Randomized, Sham Device-controlled, Double-blind Study."

Shelly Friedman, DO, Scottsdale Institute of Cosmetic Dermatology, Scottsdale, AZ.

Reviewed by Michael W. Smith on December 06, 2017

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How effective is low-level laser therapy (LLLT) in treating hair loss?

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