How Dual-Wavelength Laser Technology Works

Dual-wavelength laser technology is a system that employs 18 medical-grade lasers (with no LEDs) to deliver a comprehensive hair growth treatment. While single-wavelength devices focus primarily on the hair follicle, dual-action lasers—specifically those utilizing 655 nm and 635 nm—target both the scalp and the hair follicle root simultaneously.

This approach is based on the understanding that achieving full, healthy hair requires addressing the different stages of the hair growth cycle at the follicle level. By ensuring that the hair receives vital energy throughout its journey, this technology promotes stronger hair growth and fosters fuller, more vibrant hair overall.

LED Light vs Laser Devices

Many consumer devices rely on LEDs (Light Emitting Diodes). According to the American Hair Loss Association (Nov. 2024), LED light is dispersed and does not target the follicle directly. Because the light scatters, it reduces the energy delivered to the root, making it less effective for deep stimulation.

Dual-Wavelength Lasers (The Actonis® Advantage)

The dual-wavelength approach utilizes medical-grade lasers in two powerful wavelengths: 655 nm and 635 nm. This allows the device to target both the scalp and the follicle root. It provides a comprehensive hair growth treatment that energizes the follicle while simultaneously reducing inflammation in the scalp tissue.

How the 655 nm Wavelength Targets Hair Follicles

The 655 nm wavelength is the deeper-penetrating component of the dual-action system. Its primary function is to address the root of the hair directly.

• Targets Hair Follicles: It is specifically calibrated to reach the depth of the follicle.
• Penetrates Deeper: By bypassing the surface-level impediments, it delivers energy where it is needed most.
• Vascular Connection: It encourages blood vessels to reconnect to the hair bulb. This is a critical step in reversing thinning, as blood flow is the transport mechanism for growth elements.
• Stimulates Vascularization: By improving vascularization, the wavelength ensures an improved supply of oxygen and nutrients to the follicles, energizing them for production.

How the 635 nm Laser Technology Supports Scalp Health 

The 635 nm wavelength plays a supportive but vital role by targeting the scalp tissue surrounding the hair. This wavelength focuses on the environment in which the hair grows.

• Targets Scalp: It is absorbed by the skin layers surrounding the follicle.
• Reduces Inflammation:It helps reduce inflammation, which is often a hidden factor in hair loss that restricts growth.
• Increases Cellular Energy: It helps increase cellular energy within the scalp tissue.
• Anagen Extension: Helps keep hair in the Anagen (Growth) Phase longer, allowing for sustained length and volume.

Why Combine 635 nm and 655 nm?

Achieving full, healthy hair isn't just about surface appearance; it requires addressing the stages of the hair growth cycle. Actonis® recognizes the importance of targeting each of these stages at the follicle level.

1. The Anagen (Growth Phase)

   • Duration: Lasts 3–7 years.
   • What it is: Cells in the root are rapidly dividing, and new hair is formed.
   • The Dual-Wavelength Goal: Extend the growth phase. Technology achieves this by reducing inflammation, increasing cell proliferation, and stimulating blood flow.

2. The Catagen (Transition Phase)

   • Duration: Lasts 2–3 weeks.
   • What it is: This signals the end of active hair growth, cutting off the blood supply from the cells that produce new hair.
   • The Dual-Wavelength Goal: Optimize anchoring to keep hair from falling. The lasers work to strengthen the hair bulb and reduce oxidative stress during this delicate transition.

3. The Telogen (Resting - Shedding Phase)

   • Duration: Lasts 3–5 months.
   • What it is: A resting period when hair is shedding and not actively growing.
   • The Dual-Wavelength Goal: Shorten the resting phase and return to the growth phase. The device increases vascularization, reactivates the growth receptor, and increases cell proliferation to "wake up" the follicle.

Clinical Evidence for Dual-Wavelength Laser Therapy

The efficacy of this technology is backed by rigorous standards. The Actonis® 18 Dual Action LaserComb is FDA Cleared and Clinically Proven.

Furthermore, the technology distinguishes itself from non-laser competitors. According to data from the American Hair Loss Association (Nov. 2024), LED light used in other devices is dispersed and does not target the follicle directly, reducing the energy delivered to the root. In contrast, dual-wavelength lasers provide targeted, collimated energy that is essential for stimulating hair growth.

Treatment Time, Frequency, and Expected Results

Consistency is the key to success with laser therapy. The Actonis® system is designed to be efficient and easy to fit into a daily routine.

• Frequency: Just three uses per week.
• Duration: An 8-minute treatment time.
• Coverage: The device can be used for targeted treatment of specific thinning spots or for full scalp coverage.

Expected Results:

With consistent usage, the device promotes stronger hair growth. Users can expect to see results in as little as 3 months.

• Reverses thinning hair: By energizing the follicle.
• Increases density & fullness: By reactivating dormant follicles.
• Restores natural growth cycle: By keeping hair in the Anagen phase longer.

Who Dual-Wavelength Therapy is For

Based on the product indications, this technology is designed for a broad range of users. It is suitable for people dealing with:

• Pattern Hair Loss
• Androgenetic Alopecia
• Thinning Hair
• Aging Hair
• Menopause/Hormonal Hair Loss
• Hereditary Hair Loss

It is the ideal solution for anyone looking to restore their hair and regain their confidence through a non-invasive, home-use device.

Is There a Window for Treatment?

While this technology is highly effective, it’s helpful to understand how it works. The device sends energy directly to your hair follicles (the roots) to jumpstart growth and bring thinning hair back to life.

For the treatment to work, there must be a hair follicle present. The technology works by reconnecting blood flow to the root to “wake it up.”

This means the treatment is best for early to moderate hair thinning, as it is designed to reverse the thinning process and get your hair cycle back on track. However, it is not intended for areas where the hair follicles have already completely disappeared or have been gone for many years, as the technology requires a living follicle to produce results.

Conclusion

The science of hair restoration has evolved. By moving beyond single-wavelength stimulation and addressing the health of the scalp, Dual-Wavelength Technology offers a comprehensive solution.

By combining 655 nm light to target the follicle and 635 nm light to reduce inflammation and optimize the scalp, this therapy addresses the root causes of thinning hair. It energizes follicles, stabilizes the growth cycle, and revitalizes damaged hair.

For those seeking a medical-grade solution, the Actonis® 18 Dual Action LaserComb integrates these technologies into a single device. With patented hair parting teeth, 18 medical-grade lasers, and a clinically proven dual-action approach, it ensures that your hair receives the vital nutrients and energy it needs to thrive and flourish.

* Actonis™ laser device is indicated to promote hair growth in females with Androgenetic alopecia who have Ludwig (Savin) Classifications I - II or frontal patterns of hair loss and have Fitzpatrick Skin Types I - IV.