Infrared light and stroke: prevention and recovery

Strokes are one of the leading causes of mortality and disability worldwide. The search for new methods to prevent strokes and improve patient recovery is therefore crucial. Among these methods, red light therapyAnd infrared — provided notably through infrared LED panels specialized — is generating growing interest. This technique, also called Photobiomodulation, is Non-invasive, drug-free, safe, and usable at home. More and more studies suggest that it could improve vascular health, stimulate cerebral circulation, reduce neurological damage due to a stroke, and accelerate motor and cognitive rehabilitation patients.

In this article, we explain in an educational manner how infrared light therapy works on the body and what are its potential benefits to prevent a stroke or aid in post-stroke recovery, by relying on solid scientific data.

A promising therapy for stroke patients

Healthcare professionals are increasingly integrating Red/infrared light therapy in the treatment protocol for neurological accidents. Whether for patients who have suffered a stroke, traumatic brain injury, or other neurodegenerative disorders, this therapy is seen as a promising complement for accelerate the overall healing of the body. Indeed, LED photobiomodulation has been shown to be beneficial in various contexts of health, by reducing inflammation and stimulating brain cell functions, particularly through mitochondrial restoration, neurogenesis, and modulation of neuro-inflammatory responses. These results open new therapeutic perspectives for the management of neurological injuries. In the case of a stroke, in addition to conventional medical treatments (medications, rehabilitation, etc.), the regular use of infrared light panels could promote a faster and more complete recovery for the patient.

How infrared light supports brain healing

One of the keys to the therapeutic potential of infrared light lies in its biological effects at the cellular and vascular levels. Research conducted by the Dr. Michael Hamblin and other experts show that red and infrared light reduces brain inflammation, a major factor of neurological damage after a stroke [1]. By reducing inflammation, we limit damage to neurons and create a more favorable environment for recovery. At the same time, this light therapy stimulates neurogenesis, that is to say, the formation of new neurons and neural connections, and promotes active cellular renewal, allowing the brain to repair certain damaged areas and gradually restore its cognitive and motor functions. [2]. .

Moreover, infrared light improves cerebral blood circulation. She causes a Vasodilation (dilation of blood vessels) and even promotes the creation of new capillaries from existing vessels (angiogenesis) [1]. This increased blood flow brings more oxygen and nutrients to brain tissue, thus supporting the areas of the brain in distress after a stroke. By improving blood circulation, infrared light helps to better oxygenate the brain. It can also, in some cases, soothe the nervous system and promote a more stable heart rate, which is particularly valuable during the first few months following a stroke, a crucial period for supporting brain recovery. Patients can benefit in terms of cognitive functions (memory, concentration...) and better recovery of the affected areas.

Another fundamental aspect is the action of red/infrared light on the mitochondria, the energy centers of nerve cells. After a stroke, neurons often lackEnergy and enter mitochondrial dysfunction, which can lead to cell death and worsen neurological sequelae. Photobiomodulation is known for restore proper mitochondrial function in the neurons [1]. Concretely, exposing cells to red and infrared wavelengths stimulates the production of ATP (the cellular energy molecule) and prevents neuronal degeneration due to the lack of energy. Studies have measured up to +157% increase in ATP in the cerebral cortex in the hours following an 808 nm infrared treatment [10]. By providing this Energy By providing additional support to the neurons, we slow down their programmed death and we reduces the extent of neurological lesions after a stroke.

Penetration of infrared light into the brain

An advantage of long near-infrared (NIR) wavelengths is their ability to penetrate tissues deeply. Unlike classical visible light, NIR waves can pass through the skull and directly reach the brain. Thus, by positioning a infrared LED panel powerful near the head (for example, facing the forehead), one can illuminate the cerebral cortex in a few minutes of session [2]. Scientific studies confirm that NIR photons pass through the skull bones and are absorbed by the mitochondria of cortical neurons, thereby initiating the beneficial processes described previously. [2]. .

There are different ways to administer photobiomodulation to the brain. In a clinical setting, some experimental approaches use Laser diodes inserted intravenously or intra-arterially, or even nasal probes that diffuse light through the nasal cavity into the cranial cavity. However, these particularly invasive methods are not necessary to achieve positive effects on the brain. The regular use of infrared LED panels on the skin (for example on the forehead, or even on other parts of the body) can also bring systemic benefits that reflect on brain health. Indeed, photobiomodulation has distant effects: treating another area of the body can induce general anti-inflammatory and neuroprotective responses. For example, stimulate the abdominal region with NIR light has been shown to have indirect neuroprotective effects on the brain by improving the gut-brain axis [3]. Thus, Without directly penetrating the skull, one can still support the brain through the systemic connections of the human body.

At home, how to proceed ? The advantage of LED panels is their ease of use. Typically, you just need to position yourself about 15 to 30 cm from the panel's diodes and expose the target area for 10 to 20 minutes, several times a week. It is It is often advised to close your eyes or wear protective glasses during the session for comfort, although red/NIR light does not damage the eyes. (it does not heat the eye tissues, unlike far infrared) [12]. The key to efficiency is regularity : frequent and long-term sessions will allow neurons and vessels to continuously benefit from this light exposure, maximizing the positive cumulative effects.

Preventive effect: improving vascular health to reduce the risk of stroke

Having a first stroke significantly increases the risk of having a second one. It is therefore essential for people at risk or who have already had a stroke to adopt preventive measures. Infrared light therapy can be part of this strategy of stroke prevention thanks to its impact on certain cardiovascular risk factors.

First of all, several studies indicate that photobiomodulation can help lower blood pressure naturally. A 2022 study observed that sessions of red/infrared light reduced hypertension in patients, leading to a lasting reduction in their blood pressure [4]. Hypertension is one of the main risk factors for stroke: by better controlling it, the probability of a vascular accident is mechanically reduced. This same study also suggests that by lowering blood pressure, the risk of neurodegenerative diseases such as Alzheimer's could also be reduced. [4]. This aligns with the idea that maintain good vascular health Thanks to light therapy, it could protect against both strokes and other brain conditions related to poor blood circulation.

Then, as mentioned earlier, infrared light promotes a healthy blood circulation and better elasticity of the vessels. In maintaining cerebral microcirculation, it is possible to potentially prevent the formation of blood clots or plaques that cause an ischemic stroke, which is a type of stroke caused by the obstruction of a cerebral vessel. The red light has also demonstrated some neuroprotective effects direct effects on nervous tissue: it activates cellular pathways that make neurons more resistant to oxidative stress and toxins. Thus, regularly using a infrared LED panel could, in theory, reduce the risk of stroke in predisposed individuals, in addition, of course, to the usual medical measures (monitoring blood pressure, treating diabetes, cholesterol, etc.). It is important to emphasize that light therapy does not replace treatments prescribed by a doctor, but it can serve as a Natural additional support to keep the brain healthy.

Finally, an innovative aspect of infrared prevention concerns the link between the gut health and strokes. Recent research has highlighted thegut-brain axis, showing that an imbalanced microbiota can contribute to systemic inflammation and vascular diseases, including strokes [5]. This link suggests that gut health could play a key role as a modifiable risk factor, which can be acted upon for prevention. However, it has been demonstrated that illuminating the abdomen with infrared light can improve the gut microbiota and reduce chronic inflammation [6]. In other words, a infrared LED panel applied to the abdomen could strengthen the intestinal barrier and bacterial balance, which would have a beneficial cascading effect on the brain (less inflammation, fewer circulating toxins). This holistic approach is very interesting: by taking care of the gut through photobiomodulation, one indirectly contributes to prevent strokes and other serious diseases. This paves the way for comprehensive prevention protocols, for example by alternating light sessions on the abdomen and the skull to maximize the patient's vascular and neurological resilience.

Benefits for recovery after a stroke

Suffering a stroke often means facing a set of physical and cognitive sequelae severe: paralysis or weakness on one side of the body, speech difficulties, memory loss, vision problems, Fatigue extreme, not to mention the psychological impact (depression, anxiety, personality changes). Traditional rehabilitation (physiotherapy, speech therapy, cognitive therapy, etc.) is essential but can be long and difficult. During the months of rehabilitation following a stroke, it is crucial to also address lifestyle habits by introducing simple and regular supportive practices. Infrared LED panels, used at home, fit perfectly into this approach by providing complementary support to conventional therapies. Here is how red/infrared light can affect different aspects of recovery:

Improvement of cognitive and psychological functions

After a stroke, patients may suffer from cognitive disorders (concentration difficulties, memory problems, impairment of executive functions) as well as psychological disorders (anxiety, depression, irritability). The Photobiomodulation can help alleviate these symptoms. By increasing neuroplasticity and brain perfusion, infrared light promotes the recovery of cognitive functions. For example, a 2021 study on patients with mild to moderate dementia showed that theTranscranial illumination with NIR twice a day for 8 weeks significantly improved the cognitive functions of the patients. [8]. From the first week, there was a noticeable improvement sleep, and after 2-3 weeks of treatment, the patients exhibited less anxiety, an improved mood, and more energy on a daily basis [8]. These results suggest that a similar protocol applied to stroke survivors could enhance their cognitive and emotional recovery.

On the specific psychological level, a small pilot study examined the effect of NIR light on theAnxiety and depression [7]. Ten patients received a single 4-minute session of near-infrared light applied to the forehead. Two weeks later, 6 out of 10 patients reported a significant reduction in their anxiety and an improvement in their depressive state. [7]. Although this study did not focus exclusively on stroke patients, it demonstrates the power of light therapy to alleviate anxiety and improve mood by acting directly on the emotional brain. For a stroke patient struggling with depression or anxiety following their accident, regular sessions of infrared light could thus provide psychological well-being, thereby facilitating their active participation in rehabilitation programs. Additionally, by reducing brain inflammation and improving neuronal plasticity, Photobiomodulation can potentially prevent vascular dementia. (cognitive deterioration due to stroke lesions) in survivors, by maintaining healthier brain tissue in the long term.

Accelerated motor and physical recovery

Physical deficits are often the most visible after a stroke: paralysis or weakness of a limb, balance disorders, significant fatigue during exertion, etc. The goal of motor rehabilitation is to reconnect the brain and muscles, strengthen them, and regain maximum mobility. Infrared light proves to be a valuable ally in this process. Indeed, photobiomodulation improves muscle performance and physical recovery. . Research in the field of sports has shown that exposure to red/infrared light before and after exercise allows for faster muscle strength gains, reduces fatigue, and accelerates the recovery of the muscles used. [9]. For a patient in rehabilitation, this means that light therapy sessions combined with physiotherapy exercises could optimize muscle strengthening of the arm or leg affected by the stroke, and reduce pain or cramps after exercise.

At the neurological level, a major discovery was made in 2007: in a preliminary clinical trial (NEST-1), patients who had suffered an ischemic stroke were treated with infrared light (laser) on the head within 24 hours following the stroke. [10]. The results, evaluated 90 days later, showed that 70% of the treated patients showed improved recovery scores. that the control group only received a placebo [10]. These significant improvements – still noticeable three months after the stroke – suggest that The early exposure to light after a stroke helps to save brain tissue and facilitate rehabilitation. Even though this trial used an infrared laser in a hospital setting, it paves the way for the use of high-power LED panels on patients in the days following a stroke to improve their recovery prognosis.

Even when light therapy is started later, it can help with persistent motor problems. For example, by reducing inflammation and increasing ATP in motor neurons, infrared light can reduce spasticity (uncontrolled muscle stiffness) and improve the range of motion of the affected joints [10]. Patients with partial paralysis have also reported progress when incorporating photobiomodulation into their rehabilitation routine. Furthermore, exhaustion and chronic fatigue that affect many stroke survivors can be alleviated by red/NIR light: by boosting cellular energy production, it helps the body and brain better tolerate effort and recover more quickly from a rehabilitation session. It should be noted that blue light, often included in small fractions in LED panels, acts through the eyes to stimulate alertness and could combat daytime drowsiness, while infrared through the skin recharges the body with physical energy. [11]. .

Finally, a particularly encouraging area is the nerve regeneration. If a stroke has damaged certain nerve pathways (for example, causing neuropathy or neurological pain), the Photobiomodulation can contribute to the repair. Experiments on animal models of nerve injury show that red light reduces neuropathic pain and neuron death, while favorably modulating the response of glial cells (supporting cells of the nervous system). [11]. Even better, a study published in 2024 demonstrated that the use of an infrared device (including implantable) promotes the regrowth of nerve fibers and recovery of lost functions after a spinal cord injury [12]. These preclinical results suggest that photobiomodulation activates nerve regeneration mechanisms that were once considered impossible. Transposed to brain lesions due to a stroke, this property could help reconnect certain brain areas and recover more mobility or sensitivity even long after the stroke. Of course, Research must continue, but all these elements suggest an overall therapeutic role of infrared light in the rehabilitation of patients with neurological injuries.

The BioMax LED panels by PlatinumLED: unique advantages against the competition

In the field of infrared light therapy, not all devices are equal. The signs BioMax from the brand PlatinumLED stand out for their efficiency and cutting-edge design, which earned them the title of best LED panels 2024 in an independent comparison that evaluated more than 12 different brands (test conducted by the expert Alex Fergus).
> Thanks to our collaboration with PlatinumLED, , you can now benefit from a exclusive 5% discount on all of their light therapy panels. And to further simplify the experience: the orders are shipped directly from a Warehouse in Europe, which means no customs fees, no import formalities, and shortened delivery times. A simple, quick, and stress-free way to incorporate infrared light into your daily care routine.

Here are the main assets of the BioMax panels compared to other brands on the market:

• Unmatched irradiation power: The BioMax deliver the highest light energy in their category, ensuring optimal penetration of photons into the tissues. This means more effective sessions and faster results, as enough light reaches the target cells in depth. PlatinumLED is known for providing devices that are both very powerful and compliant with safety standards, allowing for safe use at home.
• Full and optimized light spectrum: The BioMax series combines 5 complementary wavelengths (2 visible reds and 3 near-infrareds) in the same panel, covering a wide spectrum from 630 nm to 860 nm, plus some traces of blue light and far infrared. This targeted combination allows for multi-level action: red light stimulates skin cells on the surface, promoting skin regeneration, while infrared penetrates deeply to act on muscle, nerve, and vascular tissues. Few competitors offer such a comprehensive range covering so many beneficial frequencies, which gives BioMax a versatile effectiveness (skin, muscles, circulation, brain…).
• Advanced features and ease of use: PlatinumLED constantly innovates to improve the user experience. The 8th generation BioMax panels, for example, incorporate NIR at 1060 nm (a very deep wavelength) in addition to the existing spectrum, as well as a portion of blue light for effects on mood and skin. BioMax devices offer a convenient connectivity system: they can pair with each other, be controlled via an included remote control or an ergonomic mobile app (no registration required). The user benefits from a simple interface to adjust the duration, intensity, or select specific wavelengths. Additionally, the brand provides various mounting supports (stands, pulleys, racks) to position the panel at the ideal height and angle, whether for targeted use (for example, on the forehead) or for a full-body light bath.
• Quality, reliability, and warranty: BioMax panels are designed with robust materials and feature a 3-year warranty, reflecting their durability. The value for money is excellent given the performance (a criterion highlighted in the comparison). Alex FergusBy choosing BioMax, the buyer also benefits from a Priority customer support and the expertise of a long-standing specialized manufacturer in photobiomodulation. In 2024, these panels dominated the competition on criteria such as measured power, electromagnetic safety (low EMF emissions), reduced noise level, and technological integration. All of this explains why they won the first place during the comparisonMeilleur panneau de thérapie par lumière rouge 2024"facing more than a dozen other brands on the market."

In summary, if one wishes to fully benefit from infrared light therapy to prevent strokes or support recovery, BioMax panels from PlatinumLED represent a proven high-end choice. Their unique combination of power, full light spectrum, and innovative features makes it a sustainable investment for one's health. Used regularly, they can be integrated into a comprehensive strategy aimed at reducing the risk of stroke recurrence, while improving daily quality of life. These panels allow for easily adopting an effective photobiomodulation routine at home, comparable to the treatments used in specialized clinics.

FAQ

Can infrared light prevent strokes?

Infrared light can help reduce certain risk factors for stroke, but it does not guarantee avoiding a stroke on its own. By improving blood circulation and helping to naturally control hypertension, infrared light therapy can potentially lower the risk of stroke. It should be seen as a complementary preventive tool, in addition to medical measures (blood pressure treatment, healthy lifestyle). Studies suggest neuroprotective and vasodilatory effects of photobiomodulation that could, in the long term, help prevent a stroke, especially in at-risk individuals. However, it is important to continue following conventional medical recommendations, as infrared light is only a Additional preventive measure and not an absolute guarantee.

Is infrared light therapy useful after a stroke?

Yes, more and more research indicates that red/infrared LED light therapy is beneficial in post-stroke rehabilitation. Used in conjunction with conventional rehabilitation care, it can stimulate the recovery of the brain and body. Specifically, infrared light can reduce inflammation in the brain, promote the repair of damaged neurons, and increase blood flow to affected areas. Patients who use this therapy after a stroke often observe a faster improvement of their motor and cognitive functions. For example, it can help regain muscle strength, improve memory or speech, and even alleviate anxiety or post-stroke depression. Although each case is different, photobiomodulation provides valuable additional support to optimize rehabilitation after a stroke.

What are the benefits of infrared light for the brain?

Infrared light, through its deep action, offers several notable benefits for the brain. Firstly, it stimulates cerebral cellular metabolism: by penetrating to the neurons, it increases the production of ATP (cellular energy), which helps brain cells function better, especially after stress such as a stroke or trauma. Secondly, it improves cerebral circulation by dilating blood vessels and promoting the formation of new capillaries. Better blood flow means more oxygen and nutrients for the brain, which can enhance memory, concentration, and executive functions. Additionally, photobiomodulation reduces brain inflammation and oxidative stress, two factors involved in many neurological diseases (stroke, Alzheimer's, Parkinson's). In summary, the benefits for the brain include neuroprotection (protection of neurons), accelerated neuronal repair, and optimization of brain functions (mood, cognition, sleep). These effects benefit both healthy individuals seeking to optimize their brain function and patients in neurological recovery.

How does infrared light improve cerebral blood circulation?

Red and infrared light act on blood vessels through a mechanism called vasodilation. In simple terms, when infrared light is applied to the skin, it is absorbed by the endothelial cells lining the inside of the vessels. This triggers the release of nitric oxide (NO), a molecule that induces the relaxation and dilation of arteries and capillaries. As a result, the diameter of the vessels increases, allowing blood to flow more freely and reach tissues, including the brain, more effectively. Specifically in the brain, this vasodilation means better cerebral perfusion. Additionally, infrared light promotes angiogenesis, which is the creation of new small blood vessels. This is particularly useful after a stroke, as the damaged area needs to recreate blood pathways for its repair. By improving cerebral circulation, photobiomodulation ensures that the brain receives an optimal supply of oxygen and nutrients, which can accelerate recovery and enhance mental functions (clarity of mind, intellectual sharpness). This improved circulation also helps eliminate metabolic waste from the brain, contributing to a healthier cerebral environment.

Do infrared LED panels pose any risks or side effects?

When used correctly, infrared LED panels are considered safe and cause very few side effects. Unlike high-power medical lasers, LEDs emit a diffuse light that does not burn or damage tissues. Red and near-infrared light is non-ionizing, so it does not have the harmful effects of UV or X-rays. Most users only feel a gentle warmth during the session, without discomfort. However, some precautions are advised: it is recommended to protect the eyes during a session (by closing the eyes or using tinted glasses), as the very bright light can be dazzling even if it is not dangerous for the retina during short exposures. In some people with very sensitive skin, a slight temporary redness may appear on the exposed area, but it usually disappears within a few hours. It is also advised to stay well-hydrated after a session, as photobiomodulation can slightly accelerate metabolism. In summary, the adverse effects of infrared panels are minimal compared to their benefits. By following the manufacturer's recommendations (exposure duration, panel distance, session frequency), this therapy is very well tolerated. Nevertheless, as with any treatment, it is preferable to seek the advice of a healthcare professional in case of a particular medical condition (for example, if you have a pacemaker or are pregnant) before starting light therapy sessions.

References

1. I'm sorry, but the text you provided is incomplete. Could you please provide the full text you would like translated?, M.R. (2018). Photobiomodulation for traumatic brain injury and stroke. Journal of Neuroscience Research, 96(4): 731–743.
2. Naeser, M.A. & Hamblin, M.R. (2011). Potential for Transcranial Laser or LED Therapy to Treat Stroke, Traumatic Brain Injury, and Neurodegenerative Disease. Photomedicine and Laser Surgery, 29(7): 443–446.
3. Blivet, G., Roman, F.J., I'm sorry, but the text you provided does not contain a complete sentence or context to translate. Could you please provide more information or a complete sentence for translation?, and others (2024). Photobiomodulation Therapy: A Novel Therapeutic Approach to Alzheimer’s Disease Made Possible by the Evidence of a Brain–Gut Interconnection. Journal of Integrative Neuroscience, 23(5).
4. Valverde, A. & Mitrofanis, J. (2022). Photobiomodulation for Hypertension and Alzheimer’s Disease. Journal of Alzheimer’s Disease, 90(3): 1045–1055.
5. I'm sorry, but it seems like the text you provided is incomplete. Could you please provide more context or complete the sentence so I can assist you better?, P.M., I'm sorry, but the text you provided is not in French. Could you please provide the text you would like translated from French to English?, C.A., & Kandi, V. (2023). Connecting the Dots: The Interplay Between Stroke and the Gut-Brain Axis. Cureus, 15I'm sorry, but the text you provided does not appear to be in French or contain any translatable content. Could you please provide the text you would like translated?
6. Jahani-Sherafat, S., Taghavi, H., and others (2023). The effectiveness of photobiomodulation therapy in modulating gut microbiome dysbiosis-related diseases. Gastroenterology and Hepatology From Bed to Bench, 16(4): 386–393.
7. Schiffer, F., Johnston, A.L., , and others (2009). Psychological benefits 2 and 4 weeks after a single treatment with near-infrared light to the forehead: a pilot study of 10 patients with major depression and anxiety. Behavioral and Brain Functions, 5: 46.
8. Nizamutdinov, D., Qi, X., and others (2021). Transcranial Near Infrared Light Stimulations Improve Cognition in Patients with Dementia. Aging and Disease, 12(4): 954–963.
9. Ferraresi, C., Huang, Y-Y., Hamblin, M.R. (2016). Photobiomodulation in human muscle tissue: an advantage in sports performance? Journal of Biophotonics, 9(11–12): 1273–1299.
10. I'm sorry, but it seems like the text you provided is incomplete. Could you please provide more context or complete the text you would like translated?, J.A., I'm sorry, but I need more context to provide an accurate translation. Could you please provide more information or text?, and others (2007). Infrared laser therapy for ischemic stroke: a new treatment strategy: results of the NeuroThera Effectiveness and Safety Trial-1 (NEST-1). Stroke, 38(6): 1843–1849.
11. I'm sorry, but it seems like the text you provided is incomplete. Could you please provide more context or complete the text so I can assist you with the translation?, J.R. (2020). Red-Light (670 nm) Therapy Reduces Mechanical Sensitivity and Neuronal Cell Death, and Alters Glial Responses after Spinal Cord Injury in Rats. Journal of Neurotrauma, 37(21).
12. I'm sorry, but it seems like your message is incomplete. Could you please provide more context or information so I can assist you better?, A.R., I'm sorry, but it seems like the text you provided is incomplete or not in French. Could you please provide the full text or clarify your request?, and others (2024). Implantable and transcutaneous photobiomodulation promote neuroregeneration and recovery of lost function after spinal cord injury. Bioengineering & Translational Medicine, 2024I'm sorry, but "e10674" does not appear to be a text in French that can be translated into English. Could you please provide more context or check the text for any errors?