Long COVID poses a growing challenge: Millions of people suffer from persistent symptoms months after a COVID-19 infection. The most common symptoms include chronic fatigue, respiratory problems, and cognitive impairment, which can severely impact daily life. In this article, we explain what long COVID is, what symptoms occur, and how red light therapy could potentially help treat them.

Red light therapy for long-term COVID

What is Long COVID?

Long COVID, also known as prolonged COVID, refers to health problems that persist for more than four weeks after a COVID-19 infection. Post-COVID syndrome is diagnosed when symptoms continue for at least twelve weeks and cannot be explained by other illnesses.

Symptoms of Long COVID

Long COVID can manifest itself in a variety of symptoms, including:

• Chronic fatigue : A feeling of deep tiredness that is not relieved by rest.
• Breathing problems : Persistent shortness of breath or a feeling of pressure on the chest.
• Cognitive impairments ("brain fog") : difficulty concentrating, memory problems and slowed thinking.
• Muscle and joint pain : Often associated with weakness or restricted movement.
• Cardiovascular problems : palpitations, dizziness and fluctuating blood pressure.
• Neurological symptoms : numbness, tingling, or headaches.

What is red light therapy?

Red light therapy is a non-invasive treatment method that uses light in the red and near-infrared spectrum (630–850 nm). It is frequently used in pain therapy, wound healing, and to promote regeneration.

How does red light therapy work?

Red light acts directly on the mitochondria in the cells, which has the following effects:

• Increased ATP production : ATP is the main energy source for cells. More ATP means more energy for regeneration and healing.
• Anti-inflammatory effect : The production of pro-inflammatory molecules is reduced, thus helping to alleviate inflammation.
• Improved blood circulation : Red light promotes microcirculation and ensures a better supply of oxygen and nutrients to the tissue.
• Stimulation of cell regeneration : Damaged cells can be repaired more quickly.

How could red light therapy help with Long COVID?

Long COVID is a complex illness that can affect various physiological systems in the body. Red light therapy works at the cellular level and could therefore be supportive in several areas. Here, the mechanisms and their potential benefits are explained in more detail:

1. Support of mitochondrial function

This point is particularly interesting. A study from Amsterdam University Medical Center has found evidence that mitochondria in long-COVID patients function less efficiently and therefore produce less energy. This could explain the debilitating fatigue frequently observed in affected individuals. Anyone with even a basic understanding of red light therapy should take note, as its central mechanism of action is its direct support of mitochondria!

Red light effect: As mentioned, red light activates cytochrome c oxidase, increases ATP production, and improves cellular energy. This could alleviate fatigue and promote regeneration.

2. Anti-inflammatory

Chronic inflammation plays a key role in Long COVID and is the cause of many symptoms.

Red light effect: It reduces pro-inflammatory molecules (e.g., TNF-alpha) and increases anti-inflammatory substances (e.g., interleukin-10). The immune system is regulated, and inflammation can subside.

3. Promoting regeneration

Tissues such as muscles and lungs can be damaged in Long COVID.

Red light effect: The treatment improves blood circulation by releasing nitric oxide and promotes healing through collagen production and cell regeneration. This could alleviate respiratory problems and muscle weakness.

4. Neuromodulation for cognitive symptoms

"Brain fog" and concentration problems often result from a disrupted energy supply to the nerve cells.

Red light effect: It supports the mitochondria of nerve cells, improves blood circulation in the brain, and promotes neuroplasticity. This could restore cognitive performance.

Red light therapy, through the combination of these effects, offers potential to alleviate the most common symptoms of long COVID. However, studies on its specific effectiveness are still needed.

Instructions for use

Here are our general recommendations for treating long COVID with red light therapy. These can be adapted depending on the individual case:

• Session duration : 10–20 minutes per session is recommended, depending on the device.
• Distance to the device : Maintain a distance of 15–30 cm, depending on the light intensity.
• Regularity : For optimal results, the therapy should be performed several times a week.
• Consultation with a doctor : Especially in the case of Long COVID, it is important to discuss alternative therapies with a doctor.

Which areas should be irradiated:

Fatigue and lack of energy: back, thighs, whole body treatment.
Respiratory problems: chest and upper back area.
Cognitive symptoms ("brain fog"): forehead and temple area.
Muscle pain or weakness: Directly affected muscles or joints.
Systemic effect: abdominal area or whole-body therapy.

Extra tip: Those suffering from pronounced long-COVID symptoms should consider whole-body irradiation.

Conclusion

Red light therapy offers great potential to support bodily processes disrupted in long-term COVID-19. It improves cellular energy through mitochondrial stimulation, reduces inflammation, promotes tissue repair, and supports brain function. This could alleviate fatigue, accelerate regeneration, and noticeably improve cognitive symptoms such as brain fog. Although further studies are needed, it presents a promising opportunity to significantly enhance the quality of life for those affected.

In our shop you will find high-quality red light therapy devices for various uses. Not sure which device is right for you? Don't hesitate to contact our customer service; we're happy to help.