Red Light Therapy for hair growth: what are the benefits?
Red light around 660 to 670 nm stimulates cell activity in your hair follicles and improves scalp circulation, which may contribute to more and stronger hair. Research found that hair growth increased in cases of hormonal and early hair loss, while the effect on hair loss caused by scarring is small. Expect 3 to 7 sessions per week of 10 to 15 minutes, at a distance of 30 to 50 cm, and 8 to 16 weeks before seeing results. Below, you can read about the benefits, the research, and how to apply it.
Red Light Therapy is becoming increasingly popular as a natural method for stimulating hair growth. This treatment method uses red and Infrared light to activate hair follicles. Red light therapy for hair growth can make a difference, especially in cases of early hair loss.
Please note! The text below is not intended as medical advice. This text is based on our own knowledge, user experiences, and various online sources. For skin problems, always seek advice from your medical specialist.
Table of contents
- Benefits of red light therapy for hair growth
- For a healthier scalp
- How red light therapy works against hair loss
- How do you use it for hair growth?
- Additional treatment options for hair loss
- Frequently asked questions
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Please note: this information is based on scientific sources, customer experiences and our own knowledge of light therapy. It is not medical advice. If you take medication, have a medical condition or are unsure, talk to your doctor or a specialist first.
Benefits of red light therapy for hair growth
Red light for hair growth is not a fad, but a science-based method. Research shows that red light therapy stimulates cell activity in hair follicles, which can lead to more and stronger hair.
A number of important benefits:
- Stimulates hair follicles: Light waves around 660 & 670 nm stimulate energy production in cells, which promotes hair growth.
- Supports hair loss treatment: Light therapy is often used for hair loss, such as androgenetic alopecia.
- Improved scalp circulation: Increased blood flow means more nutrients for the hair roots.
- Suitable for sensitive scalps: The therapy is non-invasive and painless, making it suitable for daily use, including on sensitive skin.
Research shows convincing results
- In women with hormonal hair loss, treatment with red light treatment (every other day) led to an increase in hair growth of as much as 51%.
- In another study conducted with 41 men, the group that underwent red light therapy developed significantly more hair follicles than the untreated control group.
- A 2014 study showed that women who used this therapy achieved an average of 37% more hair growth, without side effects.
Additional information:
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8906269/
- https://med.stanford.edu/news/insights/2025/02/red-light-therapy-skin-hair-medical-clinics.html
- https://pubmed.ncbi.nlm.nih.gov/24727445/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC8577899/
For a healthier scalp
A healthy scalp is essential for good hair growth. Red light therapy helps improve the balance of the skin. It does this, among other things, by:
- Improving skin balance and cell renewal
- Stimulating blood circulation, allowing waste products to be removed more quickly
- Reducing tension, itching, or irritation on the scalp
- Optimizing the environment in which hair grows
How red light therapy works against hair loss
The success of red light therapy depends on the wavelength. According to research, red light around 670 nanometers is the most effective against hair loss.
At this wavelength, red light penetrates deeply into the dermis layer of the skin. This stimulates hair follicles, the hair matrix, hair papillae, and surrounding blood vessels. This activates cellular metabolism and improves blood circulation, contributing to stronger and healthier hair growth.
How do you use it for hair growth?
It is important to apply red light therapy correctly. Only then will you achieve the desired effect. Usage tips:
- Frequency: 3 to 7 times per week
- Distance: Keep the device 30 to 50 cm from the scalp
- Duration: 10 to 15 minutes per session
Additional treatment options for hair loss
In addition to red light therapy, you can combine other treatments for optimal results. For example:
- Scalp massage: Stimulates blood circulation in the scalp
- Caffeine products: Shampoos or serums containing caffeine can strengthen the hair roots
- Healthy diet and supplements: Such as biotin, iron, and zinc
- Stress reduction: Stress negatively affects hair growth
Frequently asked questions
Is red light therapy safe for daily use?
Yes, the therapy is safe and painless. Daily use is even recommended for intensive hair loss.
How long does it take to see results?
You will usually see results between 8 and 16 weeks. This varies from person to person.
Does red light therapy work for all forms of hair loss?
It works particularly well for early hair loss, androgenetic alopecia, and diffuse hair loss. It is less effective for scar-related hair loss.
Can I combine red light therapy with other hair products?
Yes, you can safely combine it with shampoos, serums, or supplements. This often enhances the effect.
Want to try it yourself? View Liroma’s red light panels. You have 60 days to test at home whether it suits you.
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