what is the best red light therapy hair growth devices

The Ultimate Guide to Best Red Light Therapy for Hair Growth

Are you struggling with hair loss and seeking a safe and effective solution? Look no further than our ultimate guide to the best red light therapy for hair growth.

Hair loss has many causes, from genetics and hormonal changes to stress and poor nutrition. But whatever the reason, red light therapy can be a game changer when it comes to promoting hair growth.

Here is the reason why red light therapy Is one of the best way to grow hair.

At its core, red light therapy works by stimulating the hair follicles and increasing blood flow to the scalp. This increased blood flow helps deliver vital nutrients and oxygen to the hair follicles, promoting follicle cell regeneration.

Additionally, red light therapy reduces inflammation and improves cellular metabolism and the scalp environment. You can check out our other article on red light therapy for hair loss, which contains detailed research.

Red light therapy may be the perfect solution if you're tired of expensive hair transplants or harmful medications with harsh side effects.

In this ultimate guide to the best red light therapy for hair growth, we delve into the science behind this revolutionary treatment, explore the most effective devices on the market, and provide tips for getting the most out of your red light therapy procedure.

Research on the best red light therapy for hair loss

We believe that widely available and easily accessible red light therapy for hair loss is the best option for reaching more patients.

Extensive and effective working principles

Red light therapy lends itself to a wide range of applications due to its cellular-level working principle. In addition to hair growth, it is also used to improve athletic performance[1], burn fat[2], and more.

Back to hair growth involves exposing the scalp to red light, which penetrates the skin and is absorbed by the cells. This increases blood flow to the scalp, hair follicle activity, and collagen production in the scalp, stimulating hair growth. As a result, it is effective for most types of hair loss, including androgenetic alopecia (AGA) and nutritional deficiencies.

However, consulting with a medical professional is essential to determine if you are a suitable candidate for red light therapy. It is not recommended for those who are photosensitive or have severe skin conditions. To determine the appropriate level of treatment, please click on Live Chat or join our discussion group, where our red light consultants will provide free answers.

best wavelength for red light therapy

Effective wavelengths for hair growth

In a comparative experimental study[3] on hair growth, we discovered that the most effective wavelength range for hair growth is 630–670 nm. Surprisingly, the best treatment effect is achieved by combining red light at 655nm and infrared light above 800nm. These wavelengths respectively stimulate the activity of hair follicle cells and accelerate blood flow to the scalp, resulting in optimal hair growth.

LED red light therapy

A affordable and safer light source—LEDs

Pinar Avci's 2013 study[4] summarizes the results of clinical trials conducted by several leading medical institutions for different wavelengths and light sources. While some physicians use "spot" focused lasers to treat deep tissue lesions, LEDs are becoming more common in dermatology due to the relatively large area of tissue that needs to be irradiated.

Treating the entire scalp with a "spot" focused laser is not practical. However, many patients with hair loss desire extensive treatment of the scalp hair follicles. Laser devices are often offered in clinics or sold as part of expensive professional helmets. When LEDs are available as an affordable and easy-to-combine wavelength option that requires relatively low operator expertise, there is no reason not to consider them.

The most effective wavelengths for red light therapy for hair growth are 660 nm and 850 nm. As an affordable and safer option, we recommend LED light sources.

Red light therapy for hair loss at home: What to Look For?

This section will discuss the factors you should consider when purchasing a red light therapy hair growth device, whether a home-grade or professional-grade device that must meet your needs.

  • Wavelength: Combining 620-670nm and 800-850nm can achieve the best hair growth results.

  • FDA  Approval & Electric and Magnetic Fields (EMFs): FDA approval and a value of 0 EMFs help reduce the possibility of negative effects.

When looking for the perfect device to meet your needs and budget, consider the following factors:

  • Product type: The coverage and output power will gradually increase from combs or handheld devices to hats or helmets. Consider a comb or handheld device if you only have localized hair loss. Otherwise, a hat or helmet product is more suitable for you.
  • Types of light sources: Lasers can be more expensive than LEDs and provide faster results. However, if you don't have the budget or are more concerned about the possible risks of lasers, we recommend safer and effective LEDs. In addition, their scattering characteristics are more suitable for extensive scalp treatments.

Finally, remember to evaluate your future user experience.

  • Convenience at home: Check out the instructions or video to understand the product before purchasing. For example, why does this helmet weigh so much? Why must it be plugged in and used in a stationary position? Please don't complain about the product's limitations only after purchase; know them beforehand.

  • Learn about products from reviews: Try to choose a brand with a low probability of defective products. You can find the brand's ratings on major shopping platforms and review sites to understand durability.

3 best red light therapy devices for hair loss in 2023

Hairmax Ultima 12 LaserComb

Hairmax Ultima 12 LaserComb


FDA approval

Clinically proven brands

Easier localized treatment


Longer time to results

Risks of laser operation for non-professionals

Light Sources

12 lasers at 655nm


1 year


Wireless and lightweight

HairMax devices are frequently used in studies, and the Ultima 12 LaserComb has been clinically proven. It contains 12 medical-grade lasers, which are sufficient for treating sparse areas.

iRestore Professional Laser Hair Growth System

iRestore Professional Laser Hair Growth System


FDA approval

Highest laser power output


Less Affordable Price

Risks of laser operation for non-professionals

Light Sources

21 lasers at 650 nm and 261 LEDs at 630 nm/660 nm


4-year (Additional 2 Years)


At 2.2 pounds, you may feel uncomfortable within 25 minutes of treatment. 

The iRestore has a higher price tag of over a thousand dollars because it includes more lasers and output power than similar devices on the market. As an established brand, it offers more after-sales guarantees and has more reviews. If you believe that laser therapy is a better option and your budget allows it, then you can choose the iRestore.

Scienlodic Hair Regrowth Hat

scienlodic hair regrowth hat


FDA approval

Multi-wavelength treatment

$199 Affordable prices

Designed for the home

Safer and efficient LEDs light source


Not stylish enough

Light Sources

60 LEDs at 650 nm and 60 LEDs at 880 nm


2 years


Deformable to fit most head sizes; portable power option available

Scienlodic believes in the results of scientific research and uses multi-wavelength LEDs as a solution. In addition, it is easy to use at home; you can wear it during your lunch break or reading time, and it is not too heavy to wear, freeing your hands.

do red light therapy with scienlodic hair regrowth hat when sleeping

Summary & FAQs

This guide explores the effectiveness of red light therapy for hair loss and why 660 nm and 850 nm are the best wavelengths for hair growth. LED red light therapy is recommended as an affordable and practical option.

Following this guide and consulting with a medical professional, you can safely and effectively use red light therapy to promote hair growth and achieve the healthy, full-bodied hair you desire.

What is the best red light frequency for hair growth?

Always follow the manufacturer's instructions for the best results. We recommend using the Scienlodic LED Red Light Therapy Hat, which is safe and effective. Start with 3-4 10-minute sessions per week. Then, if you need more help, click on the live chat in the lower right corner or join the group chat to get a free response from a Red Light Therapy consultant.

What are the side effects of red light therapy for hair growth?

You can see from some of the reviews the negative results of laser therapy used by non-professionals, so we always recommend using safer LEDs.

scienlodic hair regrowth hat and consultation tips


Additional Resources:

[1] Cotler HB, Chow RT, Hamblin MR, Carroll J. The Use of Low Level Laser Therapy (LLLT) For Musculoskeletal Pain. MOJ Orthop Rheumatol. 2015;2(5):00068. doi 10.15406/mojor.2015.02.00068. Epub 2015 Jun 9. PMID: 26858986; PMCID: PMC4743666.

[2] Avci P, Nyame TT, Gupta GK, Sadasivam M, Hamblin MR. Low-level laser therapy for fat layer reduction: a comprehensive review. Lasers Surg Med. 2013 Aug;45(6):349-57. doi: 10.1002/lsm.22153. Epub 2013 Jun 7. PMID: 23749426; PMCID: PMC3769994.

[3] Barikbin B, Khodamrdi Z, Kholoosi L, Akhgri MR, Haj Abbasi M, Hajabbasi M, Razzaghi Z, Akbarpour S. Comparison of the effects of 665 nm low level diode Laser Hat versus and a combination of 665 nm and 808nm low level diode Laser Scanner of hair growth in androgenic alopecia. J Cosmet Laser Ther. 2017 May 17. doi: 10.1080/14764172.2017.1326609. Epub ahead of print. PMID: 28513251.

[4] Avci P, Gupta A, Sadasivam M, Vecchio D, Pam Z, Pam N, Hamblin MR. Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring. Semin Cutan Med Surg. 2013 Mar;32(1):41-52. PMID: 24049929; PMCID: PMC4126803.