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Dr. Alpana Mohta Ranka, MD, DNB, IFAAD, is a dual-board-certified dermatologist with over 90 research publications in peer-reviewed scientific journals.


LED Hair Growth Devices: Top Recommendations (2024)

Updated: May 5

LED hair growth therapy has emerged as a promising non-invasive treatment. This article delves into the science, effectiveness, side effects, and whether LED therapy is right for you. To jump to the recommendations, click here.

table of contents on the article on LED hair growth

How does LED lead to Hair Growth?

LED (Light-Emitting Diode) therapy uses red and infrared wavelengths of light to target cells within the scalp. LED therapy operates through a process known as photobiomodulation, wherein these wavelengths of light interact with cellular components to trigger biological responses. This mechanism involves the absorption of photons by chromophores within cells, leading to biochemical changes that promote cellular function and tissue repair.

In the context of hair growth, LED treatment targets scalp follicles, influencing processes like leukocyte migration, metabolism, and cell adhesion. The key mechanisms include increased blood circulation to the scalp, stimulation of hair cells, and a reduction in inflammation, all of which are crucial for maintaining healthy hair growth.

What does the Research Say?

Research on LED therapy for hair growth is still ongoing, with some studies suggesting its potential benefits. The therapy is found to be beneficial for conditions such as androgenetic alopecia (common baldness), alopecia areata (an autoimmune condition), and telogen effluvium (stress-related hair loss)​.

For instance, one study published in the Annals of Dermatology found that low-level 650 nm red light encouraged the growth of human hair follicles in laboratory experiments. Additionally, it significantly delayed the transition of the hair cycle from the growth phase to the shedding phase.

In human studies, another report published in Lasers in Medical Science demonstrated the effectiveness of LLLT in managing androgenetic alopecia. In a blinded trial, participants using a laser helmet showed significant improvements in hair density and diameter compared to those using a sham device at week 24.

How Often to Use Red Light Therapy for Hair Growth

The recommended frequency for using red light therapy for hair growth varies, but the general consensus is that it should be used two to three times per week. Each session should last about 15-20 minutes​​.

This schedule allows for optimal exposure without overdoing it, as excessive use might reduce the effectiveness of the treatment and lead to potential side effects like scalp irritation​.

It's important to be consistent with the treatment and to maintain this routine for several months to see the best results. Initial improvements in hair thickness and health might be noticeable within the first few weeks, but more significant hair growth typically becomes visible after 3-6 months of regular use​​.

How often to use red light therapy for hair growth?

Before starting red light therapy, it's advisable to consult with a healthcare professional, especially if you have any underlying conditions or concerns.

Top Recommended LED Hair Growth Devices - Helmets, Caps and Combs

Choosing the right device—preferably one that is FDA-approved and clinically tested—is essential for safety and effectiveness. Consistent application as directed by manufacturers and doctors is vital for achieving desirable outcomes.

  1. HairMax Laser Comb Ultima 9 This device is easy to use; simply comb through your hair slowly, allowing the light to target your scalp, for about 10-15 minutes, three times a week.

  2. Theradome PRO Laser Hair Growth Helmet LH80 Wear this helmet for 20 minutes, twice a week. It covers the entire scalp and is hands-free.

  3. iRestore Laser Hair Growth System Similar to Theradome, this helmet requires usage for about 25 minutes every other day.

  4. CapillusUltra Mobile Laser Therapy Cap This cap can be worn discreetly under a hat for six minutes daily, providing flexibility with a portable design.

When using these devices, ensure your hair is clean and free from styling products to maximize light absorption. You can use the light therapy either before or after your hair growth serum.

Are there any Side Effects of Using LED Devices for Hair Growth?

LED therapy is considered safe, with minimal risk of side effects. Some individuals may experience temporary redness or irritation of the scalp following treatment.

Advantages and Disadvantages


  • Non-invasive and painless

  • Usable at home

  • Minimal side effects

  • Effective for both men and women


  • Results may vary widely

  • High initial cost for some devices

  • Necessitates long-term commitment to see results


LED hair growth therapy offers a promising option for those experiencing hair thinning or loss. While it is not a guaranteed solution for everyone, its non-invasive nature and positive outcomes reported by many users make it worth considering.

As with any treatment, effectiveness can vary based on individual conditions and adherence to treatment regimens. Always consult with a professional and choose reliable, proven devices for the best results.

It's interesting to note that while we discussed how to use light-based devices to help with hair growth, certain light-based devices can also help in hair removal.


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