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 blood circulation in the scalp, which may contribute to fuller and stronger hair. Research found that hair growth increased in hormonal and early-stage hair loss, while the effect on scarring hair loss is small. Expect 3 to 7 sessions per week lasting 10 to 15 minutes, at a distance of 30 to 50 cm, and allow 8 to 16 weeks before seeing results. Below, you can read about the benefits, the research, and how to use 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 particular difference in cases of early-stage hair loss.
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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 may lead to fuller and stronger hair.
Several important benefits:
- Stimulates hair follicles: Light waves around 660 & 670 nm stimulate energy production in cells, promoting hair growth.
- Supports hair loss treatment: Light therapy is often used for hair loss, such as androgenetic alopecia.
- Improved blood circulation in the scalp: 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. This also applies to sensitive skin.
Research shows convincing results
- In women with hormonal hair loss, treatment with red light treatment (every other day) led to a 51% increase in hair growth.
- In another study, conducted among 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, on average, 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 in part 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 most effective against hair loss.
At this wavelength, red light penetrates deeply into the dermal 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 use 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:
- Hair massage: Stimulates blood circulation in the scalp
- Caffeine products: Shampoos or serums with caffeine can strengthen the hair roots
- Healthy diet and supplements: Such as biotin, iron, and zinc
- Stress reduction: Stress has a negative effect on 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 before I see results?
You usually see results between 8 and 16 weeks. This varies from person to person.
Does red light therapy work for all types of hair loss?
It works particularly well for early-stage hair loss, androgenetic alopecia, and diffuse hair loss. It is less effective for scarring 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? Explore Liroma's red light panels. You have 60 days to test at home whether they are right for you.
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