How Does Red Light Therapy Help Hair Growth?
In fact, the American Academy of Dermatology declared August as National Hair Loss Awareness Month since more and more people are influenced by it. Some people may choose to shave their heads or wear wigs, but others may choose to have a hair transplant or apply medicines to restore their lush appearance. Yet among these traditional approaches, none of them deal with the core of hair regrowth. Fortunately, the recent discovery of applications of red light therapy has now been proven to help restore hair growth. In this blog, we’ll unveil the truth behind red light therapy’s efficacy for hair loss, and discuss the results of clinical trials that have been conducted in this area. Ready to start making progress on your hair loss journey? Continue reading to learn more about red light therapy at home.
What are the benefits of red light therapy for hair growth?
That low-level light therapy has a hair-stimulating effect was first observed in the laser experiment in mice conducted by Endre Mester. In this research investigating the potential carcinogenic effects of laser exposure, mice regrew hair in shaved areas significantly faster than unexposed mice. In other clinical trials, researchers also found that some patients had paradoxical hair growth around locations that had previously received laser hair removal or close to lesions that had received laser treatment. Subsequently, several studies—ranging from experimental animal studies to clinical studies—were conducted to show the effectiveness of LLLT for promoting hair growth, and LLLT was approved for hair loss treatment by the U.S. Food and Drug Administration in 2007.
Red light therapy promotes the cell respiration
The cellular and molecular action mechanisms of red light therapy are now well studied. Cytochrome c oxidase (CCO), the terminal enzyme of the respiratory chain in mitochondria, has been most often identified as the primary photoreceptor or chromophore in red light therapy. The most widely accepted mechanism of red light therapy is that nitric oxide, a competitive inhibitor of oxygen binding in the respiration chain, is photodissociated from CCO, allowing an immediate influx of oxygen, which drives the electron transport chain to generate adenosine triphosphate (ATP) and ROS. Afterward, changes in the redox state will induce redox-sensitive transcription factors, nuclear factor keppa B and activator protein-1, which will in turn enhance gene transcription and protein synthesis, contributing to cell proliferation and migration. This fact about red light therapy’s effects on cell respiration has been documented in this study.
Red light therapy stimulates hair follicle stem cells
The speculated function of red light therapy for hair growth is the direct stimulation of hair follicle stem cells in the bulge region, thereby inducing differentiation and proliferation via increasing the level of heat shock proteins (HSPs), as stated in this study.
Red light therapy prolongs the anagen phase
The structure of hair contains two parts: the hair shaft, present above the epidermis, and the hair follicle (HF), present below the epidermis. Besides, HFs are complex mini-organs undergoing cycles of anagen (growth), catagen (degeneration), and telogen (rest). The life of hair will experience four phases.
1) Anagen phase: It is a growing phase, which is the longest phase and lasts around 3–6 years but differs depending on hair type.
2) Catagen phase: It is a short transition from the anagen phase to the telogen phase when the hair follicle shrinks and growth reduces.
3) Telogen phase: hair doesn’t grow or shed during this phase.
4) Exogen phase: hair sheds during this phase.
Oxidative stress is one of the most destructive elements for cells, while red light therapy helps cells by relieving oxidative stress. Numerous peer-reviewed clinical studies found that red light therapy increases the duration of the anagen phase and prevents hair from going into the catagen phase prematurely, thereby lengthening the lifespan of hairs. More evidence can be found in this study, which clarified that red light therapy postponed the transition of the catagen phase.
Red light therapy helps with inflammation
Inflammation is an acute symptom of many diseases, including scalp dermatitis and alopecia. As one of the important signs before several types of alopecia, inflammation is also considered an agent of diagnosis. The modulatory effect of inflammation from red light therapy plays a significant role in treating alopecia areata, an autoimmune disease. As this study declared, the adherens junction is a key regulator of tissue architecture and dynamics via control of cell proliferation, motility, and survival, and the adherens junction will be disrupted by inflammation. This pathway also contributes to hair restoration from red and near-infrared light therapy.
Clinical trials on red light therapy for hair growth
There’s no doubt that red light therapy is an effective treatment for hair growth. Red light therapy has been shown to be effective in treating a variety of hair problems, including thinning hair, scalp itchiness, scalp dermatitis, dandruff, bald spots, and other symptoms of scalp inflammation. Some of the benefits of red light therapy for hair growth include increased density, hair regrowth, alopecia prevention, and more. Clinical trials have examined and demonstrated the efficacy of red light therapy for hair growth.
This clinical study of a controlled trial applied the experimental intervention at around 655 nm wavelengths over the course of 16 weeks. The picture below shows the hair density and hair thickness of patients treated with red light therapy increased positively from the baseline compared with the placebo.
The photographs of hair vertex view from patients were recorded as the following pictures. Each showed a significant increment in hair density and hair thickness at 16 weeks.
Red light therapy is one of the most popular treatments for hair growth because it uses red light to stimulate the production of new cells in the scalp. This helps to grow hair faster and stronger. This type of radiation penetrates the skin more deeply than other types of light, which helps to activate hair follicles and promote hair growth. What’s more, red light therapy also helps to stimulate melanin production, which is what gives hair its color.
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If you’re looking for a treatment that can help you achieve thicker and healthier hair, red light therapy may be the answer.
Using Bestqool red light therapy to restore your hair
Hair loss is a common problem, and it can be really tough to find a solution. However, red light therapy using a specific wavelength to promote follicle stem cell proliferation and modulate the lifecycle of existing hair shows a promising treatment for alopecia. Among the abundant options of red light therapy devices, it can be difficult to choose a true medical-grade device for your hair loss symptom. Although a lot of companies claiming their products as the best red light therapy device you can find, you should be well aware that not every LED panel can provide effective therapeutic effects, and not every manufacturer can produce products with advanced LED technology for medical applications. Poor-quality LED panels can’t deliver adequate irradiance and focus on the narrow band of the most therapeutically effective wavelengths, i.e., red light at 660 nm and near-infrared light at 830 nm. The light density of LED sources is hard to model, and there is a variety of LED source designs depending on the different irradiance modeling methods and other specific techniques to control the stability and uniformity of the light beam.
The mission of Bestqool is to provide the best red light therapy for both aesthetic and medical purposes. Bestqool is able to apply the advanced LED technology on our products to deliver the most effective wavelengths and the highest irradiance performance of industry in this field. Besides, all Bestqool products are FDA-registered and ETL-certified to the safety use of electrical devices. It is worth noting in this place that all Bestqool products are passed FDA supervision that ensures the desired effects as claimed and free of EMFs. It is our honor to deliver the best red light therapy experiences to our customers and all Bestqool products also offer a three-year warranty to free you off worries.