Laser Science

Six Minutes A Day. FDA-Cleared,Clinically Proven Technology.

The Science of Laser Therapy

At the center of all Capillus laser therapy cap is proven science that’s FDA-cleared and clinically tested. This technology is known as low-level laser therapy, or photobiomodulaton. In summary, light waves penetrate your scalp and help promote healthy hair growth without the need for expensive medications and treatments. LLLT, as it’s known for short, is an effective way to treat androgenetic alopecia for both men and women. Here at Capillus, our laser therapy caps utilize this technology to help stimulate hair growth and that’s safe.

In 1966, Hungarian physician Endre Mester first published an experiment in which he observed accelerated hair growth in rats treated with laser therapy. He originally was observing if laser therapy can be used to control and treat cancer cells. With this observation, the field of low-level laser therapy was created. In the past couple decades, low-level laser therapy has started to become much more popular as an effective treatment against androgenetic alopecia, or hair loss caused by genetics. Organizations like the American Board of Hair Restoration Surgery and the International Society of Hair Restoration Surgery have accepted low-level laser therapy to combat hair loss in men and women.

So how does low-level laser therapy work?

It all starts with the light emitters themselves – the laser diodes found in Capillus hair-growth devices. These medical-grade laser diodes shine 650 nanometer light right at your scalp. Learn more about why we use lasers versus LEDs here. Once the light penetrates your scalp, it mainly does two things: it starts a biochemical response within the mitochondria that causes more ATP (energy) generation and causes more blood flow to occur. These two acting in tandem allow for the right nutrients and energy to reach the hair follicle and grow hair that’s denser and healthier.

Low-level laser therapy has been reported to:

  • Increase cell metabolism and health of the blood vessels in the scalp for thicker and more durable hair shafts.
  • Stimulate the sebaceous glands for silkier-looking hair.
  • Increase melanin production in the hair follicles, darkening gray hairs.

Capillus caps changed the game and revolutionized the use of low-level laser therapy in at-home devices that anyone can use at any time. Our original hair growth device was designed to send bursts of red-light therapy at your scalp, but we switched to a consistent delivery of red light that significantly reduced the amount of time it took to receive such therapy. Now, you can start regrowing your hair in as little as 6 minutes a day.

Red light therapy can be used for more than just hair restoration. Some of the other places you may find red light therapy include:

Physical therapists

To treat a wide variety of acute and chronic musculoskeletal aches and pains.


To treat inflamed oral tissues and to heal diverse ulcerations.


To treat edema, non-healing ulcers, burns, and dermatitis.


To relieve pain and treat chronic inflammations and autoimmune diseases..

Veterinary medicine

To facilitate wound healing, reduce inflammation, and treat musculoskeletal pain.

Sports Medicine

To reduce swelling and hematoma, relieve pain, improve mobility, and treat acute soft-tissue injuries.

How Capillus can help you regrow your hair.

Capillus are the market leaders in low-level laser therapy used for hair regrowth. Our hair growth caps were designed to help men and women reverse the signs of androgenetic alopecia, or hair loss. Our laser therapy caps range from targeting the whole scalp to specific parts of your head with our Focals line. All our caps use medical-grade laser diodes and can help you regrow your hair in just 6 minutes a day and help you regain your halo.

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Clinical Research

Watch Dr. Daniel McGrath explain the science behind Capillus

Capillus Experts

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We’re Serious About Facts.

Are there clinical trials that support the efficacy of Capillus?

Yes. Capillus Laser devices only use clinically proven technology. In fact, the premiere laser therapy cap model from Capillus - the CapillusPro model - has been proven effective through an independently reviewed clinical trial for which results have been published in an esteemed medical journal, Dermatologic Surgery. Dermatologic Surgery is a monthly peer-reviewed journal published by American Society for Dermatologic Surgery that deals with the subject matter of dermatology.

The CapillusPro device has been clinically proven in a double-blind clinical study registered on and managed by a neutral third party.* Clinical trial data indicated that low-level laser treatment of the scalp for 17 weeks with the CapillusPro device significantly improved hair counts by 51% in study participants who used the active (non-placebo) device. Subjects were able to use the device on a self-treatment, home-use basis. No side-effects of any kind were reported from clinical trial participants. The CapillusPro was proven to be a safe and effective treatment for androgenic alopecia within the appropriate stages of hair loss and skin tones as per FDA clearance.

Please note that the results mentioned above are specifically for the CapillusPro model. There have been no clinical trials to date on the other Capillus models to be able to assert an exact percent of average increase of hair.

*See details of clinical trials at

There have also been many other clinical trials that support the efficacy of low-level laser technology for treatment of androgenetic alopecia.

Is Capillus good for use after hair transplant procedures?

Yes, Capillus uses safe, low-level lasers to stimulate, energize, and renew cells within the hair follicle for thicker, healthier hair. It also helps those who’ve undergone a hair transplant procedure to protect the new hair growth. Follow your transplant physician's directions for follicle support after transplant.

Are Capillus products safe for women?

Yes. Unlike some prescription medications for hair loss, Capillus low-level laser therapy (LLLT) products are safe for use by women.

In fact, the convenience and effectiveness of personal LLLT products makes the Capillus products the first choice among many hair restoration surgeons who treat women suffering with thinning, shedding, or balding.

Why should I choose Capillus over other brands of laser therapy caps?

Capillus revolutionized the hair restoration industry with the Capillus laser cap a decade ago by making professional-strength laser therapy available to hair loss patients at home. Capillus was the first laser therapy cap to be cleared by the US FDA for treatment of androgenetic alopecia. Since then, many have tried to imitate. Don't settle when it comes to your hair health.

At Capillus, we prioritize excellence above all else. Capillus caps are designed, engineered and assembled in our US-based, ISO13485-certified facility. We only use the highest quality, medical-grade lasers. Our premium laser caps are backed by our elite Physician Network, FDA clearances, our Satisfaction Guarantee, Manufacturer Warranty, and in-house, expert support. We offer choices in models making our caps affordable. We accept most credit cards and offer several payment options, including various financing options making it more affordable.

What is the difference between lasers and LEDs for hair regrowth?

Capillus laser therapy devices use only medical grade laser diodes as a light source. What does this mean? You get the right amount of light energy exactly where you need it. Capillus uses lasers because the output penetrates deeper, better and is clinically proven to be therapeutic for their specific purpose.

Laser light does not spread as much as LEDs over the same distance, which allows lasers to penetrate tissue to a deeper level with higher concentration. For photobiomodulation therapy, the farther the light is from the target, the less intense and less effective the treatment will be.

For light therapy to be effective, it needs to reach the cells that respond well to photobiomodulation therapy.

LASER stands for Light Amplification by Stimulation of Emitted Radiation. This simply means that a source of light is amplified within a gain medium and emitted in a specific way. LASER produces a very intense beam of light which has the following properties:

  • Monochromatic (meaning it consists of one wavelength)
  • Coherent (meaning all parts are in phase)
  • Collimated (meaning all parts travel in one and same direction)

LED stands for Light-emitting Diode. And it’s pretty much just that. A diode that emits light when electricity passes through it. Often in pretty colors.

LED light can produce collimated light (with a focusing lens) but not coherent light thus they do not concentrate all their power in a coherent beam. Laser diodes by definition produce effective collimated and coherent light output.