Laser Hair Therapy: A Non-Invasive Solution for Hair Loss

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Laser Hair Therapy: A Non-Invasive Solution for Hair Loss

Low-level laser therapy (LLLT) is a non-invasive way to fight thinning hair. Here is how hair grows, how DHT shrinks follicles, and how red laser light can help weakened follicles regain their size when they are treated early.

Close-up of a man combing his hair
Updated September 28, 20265 min read

Key takeaways

  • Low-level laser therapy (LLLT) is a non-invasive treatment that has been found to improve hair quality, stop the progression of hair loss and even promote new hair growth.
  • Typically about 90% of hair follicles are actively growing new hair. Once thinning begins, that share drops to 80% or less, and DHT shrinks follicles so they produce shorter, weaker hair.
  • Red light increases blood flow, cellular energy and protein synthesis in the scalp and may reduce inflammation around miniaturized follicles. Follicles stimulated in the earlier stages of miniaturization may regain their size.
  • A hair transplant is the only permanent solution for hereditary hair loss. LLLT helps strengthen weak hair and is often used alongside a transplant to accelerate healing.

Hair loss can often be an undesirable aspect of life. Fortunately, with recent advances in technology, there are several treatments that may reduce, prevent, or even reverse hair loss. Low-level laser energy has been found to stimulate hair growth on the scalp to improve hair quality, stop the progression of hair loss, and even promote new hair growth.

The Capillus RX DUO laser cap
A low-level laser cap, the Capillus RX DUO.

Although hair transplantation is the only permanent solution for hereditary hair loss in both men and women, low-level laser therapy (LLLT) offers help by rejuvenating hair and strengthening weak, anemic hair to assist in the fight against dihydrotestosterone (DHT).

How hair grows

Cross-section illustration of skin labeled epidermis, dermis and hair follicle: hairs grow from follicles that reach down through the epidermis into the dermis
Skin and hair follicle diagram, labeled: epidermis, dermis and hair follicle.

Before learning about laser hair therapy to reinvigorate hair growth, it is important to understand how hair grows. Hair follicles extend through both the dermal and epidermal layers of the skin and are responsible for producing hair. Projecting into the base of each hair follicle is a structure called the dermal papilla, which is composed of rapidly dividing cells and small blood vessels. These cells are packed together in the hair follicle to create a new hair shaft, which pushes out and replaces the old hair shaft after it has become detached from the dermal papilla.

Follicle miniaturization

Follicle miniaturization diagram: under DHT, a normal hair follicle shrinks step by step into a miniaturized hair follicle. The text in the image reads: when dihydrotestosterone (DHT) interacts with the dermal papilla, the hair follicle miniaturizes and produces shorter, weaker hair.
Follicle miniaturization diagram: DHT shrinks a normal hair follicle into a miniaturized one that produces shorter, weaker hair.

Typically, about 90% of hair follicles are actively growing new hair; however, with the onset of hair thinning, this percentage drops to 80% or less. This decrease in the number of follicles producing new hair coincides with an increased level of a hormone known as dihydrotestosterone, or DHT.

About 90%

of hair follicles typically growing new hair

80% or less

still growing once hair thinning begins

DHT disrupts the normal hair cycle, causing hair follicles to miniaturize and consequently produce the shorter, weaker hair that is characteristic of thinning hair. In the continued presence of DHT, hair follicles may keep shrinking until they no longer produce hair and permanent baldness results. However, if hair follicles are stimulated in earlier stages of miniaturization, they may regain size and return to producing strong, thick hair.

Free consultation

How far has your thinning progressed?

A free, in-person consultation with an Advanced Hair Restoration® physician shows how far miniaturization has gone and whether laser therapy can still help. The physician examines your scalp and donor area directly and maps your exact graft count if a hair transplant is the better option.

How LLLT works

Cross-section illustration of a single hair follicle with the dermal papilla circled and labeled at its base, where small blood vessels enter
Hair follicle diagram, labeled: the dermal papilla at the base of the follicle.

LLLT is designed to stimulate miniaturized hair follicles with low-level laser energy. A laser concentrates light waves of a specific energy into a beam of colored light. Humans can see a range of energy as colored light, known as the visible light spectrum. The LLLT unit emits light from the red end of this spectrum, which has been proven to stimulate body tissues to increase cellular energy.

This increase in energy enhances cellular processes such as growth and eliminating waste. It may also reduce the inflammation surrounding miniaturized hair follicles, allowing these follicles to take in more nutrients and restore their normal size.

The LLLT unit also stimulates hair follicles in the transitional and resting phases of the growth cycle to complete these phases more rapidly. Once these phases are complete, the hair follicles are available to take part in an actively growing phase, which is stimulated to produce thicker, fuller, shinier, and healthier-looking hair.

  • Powerful, low-level light energy increases blood flow to the scalp and hair follicle.
  • Light penetrates into the scalp tissue, where it stimulates microcirculation and improves cellular metabolism and protein synthesis.

Benefits of low-level light therapy

Magnified view of the scalp with circled follicular units showing healthy hairs growing after low-level laser therapy
Healthy follicles after low-level laser therapy: a magnified view of the scalp, with growing follicular units circled.
  • Slows the rate of hair loss.
  • Increases thickness and density.
  • Repairs and improves hair shaft quality.
  • Gives hair more manageability and more vibrant color.
  • Often used in combination with hair transplantation to accelerate healing, reduce redness and decrease discomfort.

Questions patients ask

Laser hair therapy questions

How does laser hair therapy work?

Low-level laser therapy (LLLT) stimulates miniaturized hair follicles with light from the red end of the visible spectrum, which increases cellular energy. The light increases blood flow and microcirculation in the scalp, improves cellular metabolism and protein synthesis, and may reduce the inflammation around miniaturized follicles so they can take in more nutrients and restore their normal size. It also helps follicles in the transitional and resting phases complete those phases more rapidly and move into an actively growing phase.

What are the benefits of low-level light therapy?

It slows the rate of hair loss, increases thickness and density, repairs and improves hair shaft quality, and gives hair more manageability and more vibrant color. It is also often used together with hair transplantation to accelerate healing and reduce redness and discomfort.

Can laser therapy help follicles that DHT has shrunk?

It may, if the follicles are treated early. DHT disrupts the normal hair cycle and causes follicles to miniaturize and produce shorter, weaker hair, and in the continued presence of DHT they may keep shrinking until they no longer produce hair. Follicles that are stimulated in the earlier stages of miniaturization may regain size and return to producing strong, thick hair.

Is laser hair therapy a permanent solution for hair loss?

No. Hair transplantation is the only permanent solution for hereditary hair loss in both men and women. LLLT helps by rejuvenating hair and strengthening weak, anemic hair in the fight against DHT, and it is often used together with a hair transplant to accelerate healing.

Real Results

Simple 1 Day Treatment®. Lifetime Results.

Every photo below is a real Advanced Hair patient: Advanced FUE™, their own natural hair, Guaranteed to Grow for Life™.

Hair transplant before photo: Kyle M. · 3,000 Advanced FUE™ grafts
Hair transplant after photo: Kyle M. · 3,000 Advanced FUE™ grafts

Kyle M. · 3,000 Advanced FUE™ grafts

Hair transplant before photo: Scott H. · 2,500 Advanced FUE™ grafts
Hair transplant after photo: Scott H. · 2,500 Advanced FUE™ grafts

Scott H. · 2,500 Advanced FUE™ grafts

Hair transplant before photo: Madison T. · 3,300 Advanced FUE™ grafts
Hair transplant after photo: Madison T. · 3,300 Advanced FUE™ grafts

Madison T. · 3,300 Advanced FUE™ grafts

Hair transplant before photo: AJ S. · 2,500 Advanced FUE™ grafts
Hair transplant after photo: AJ S. · 2,500 Advanced FUE™ grafts

AJ S. · 2,500 Advanced FUE™ grafts

Individual results may vary.

Next step

Find out what laser therapy can do for you

Schedule a free consultation with Advanced Hair Restoration® to learn whether low-level laser therapy, a hair transplant, or both are right for you. Consultations are in person, so the physician can examine your scalp and donor area directly and map your exact graft count.

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