What Is Red Light Therapy and How Does It Work?
What Is Red Light Therapy?
Red light therapy (RLT), also known as photobiomodulation (PBM), is a non-invasive wellness technology that uses specific wavelengths of red and near-infrared light to support healthy cellular function.
Unlike ultraviolet (UV) light, which can damage the skin, red and near-infrared light are non-ionizing and have been widely studied for their potential to support skin health, muscle recovery, circulation, and overall wellness.
When absorbed by the body's cells, these wavelengths interact with mitochondria—the cell's energy producers. Research suggests this process may help support ATP (cellular energy) production, which plays an important role in normal cellular function and recovery.
Today, red light therapy is commonly used at home, in wellness clinics, and in professional sports settings as part of a healthy lifestyle.
Note: Red light therapy is intended to support general wellness and is not intended to diagnose, treat, cure, or prevent any disease.
Key Facts
- Red Light: Typically 630–660 nm
- Near-Infrared Light: Typically 810–850 nm
- Non-invasive & Drug-free
- No UV Radiation
- Suitable for Daily Wellness Routines
How Does It Work?
Red and near-infrared light penetrate the body at different depths.
- Red Light (630–660 nm) primarily reaches the skin's surface layers and is commonly associated with skin appearance and healthy collagen production.
- Near-Infrared Light (810–850 nm) penetrates deeper into tissues and is often studied for its role in supporting muscles, joints, and post-exercise recovery.
Together, these wavelengths work at different depths to support overall cellular wellness.
Why Do People Use Red Light Therapy?
Millions of people use red light therapy as part of their daily wellness routine. Research suggests it may support healthy cellular function and overall well-being when used consistently.
People commonly use red light therapy to support:
🌙Daily Wellness- Help your body recover from everyday physical stress and activity.
âš¡ Cellular Energy- Support healthy cellular energy production through photobiomodulation (PBM).
🌿 Skin Health – Support healthy-looking skin and collagen production.
💪 Muscle Recovery – Help the body recover after exercise and physical activity.
🦵 Joint Comfort- Help support everyday joint comfort and flexibility.
😌 Relaxation & Wellness- A calming addition to your daily wellness and self-care routine.
Red Light vs Near Infrared
| Feature | 🔴 Red Light | ⚫ Near Infrared |
|---|---|---|
| Wavelength | 630–660 nm | 810–850 nm |
| Visibility | Visible | Invisible |
| Works Best For | Skin wellness | Deep tissue wellness |
| Penetrates | Surface layers | Deeper muscles & joints |
| Supports | Healthy-looking skin & collagen | Recovery, circulation & everyday comfort |
| Ideal Use | Face & skin care | Body, muscles & joints |
Why use both?
Many red light therapy devices combine Red Light (630–660 nm) and Near Infrared (810–850 nm) to support both surface skin and deeper tissues in a single treatment.
Is Red Light Therapy Safe?
Does it produce radiation?
Yes—but not the harmful kind.
Red light therapy uses non-ionizing light, which is part of the visible and near-infrared light spectrum. Unlike X-rays or ultraviolet (UV) radiation, it does not damage DNA or make you radioactive.
The light simply delivers photons that may be absorbed by cells to support normal cellular function.
Key points
- ✅ No ionizing radiation
- ✅ No UV exposure
- ✅ Does not make your body radioactive
- ✅ Non-invasive and drug-free
Can Red Light Therapy Cause Burns?
Under normal use, red light therapy should not cause burns.
Most FDA-listed red light therapy devices are designed to operate at temperatures that are comfortable for skin contact. Some users may feel a gentle warming sensation during treatment.
However, burns or skin irritation could occur if:
- The device is used longer than recommended.
- The device is damaged or malfunctioning.
- It is used on skin with reduced heat sensitivity.
- The device is covered by thick fabrics that trap heat.
To use safely:
- Follow the recommended treatment time.
- Stop use if you experience unusual discomfort.
- Allow the device to cool if instructed in the user manual.
Who Should Not Use Red Light Therapy?
Although red light therapy is generally considered safe for many people, some individuals should consult a healthcare professional before use.
This includes people who:
- Are pregnant or breastfeeding.
- Have active cancer unless advised by their physician.
- Have epilepsy or a history of light-triggered seizures.
- Take medications that increase sensitivity to light.
- Have severe skin conditions or open wounds.
- Have recently undergone surgery unless approved by their healthcare provider.
- Are unable to feel heat normally due to nerve damage or reduced sensation.
If you have any medical condition or are unsure whether red light therapy is appropriate for you, consult your healthcare provider before use.
Safety Precautions：
For a safe and comfortable experience:
- Follow the recommended treatment time and frequency.
- Do not stare directly into high-intensity LEDs. Wear protective eyewear if recommended.
- Keep the device clean and dry.
- Do not use the device if it is damaged.
- Do not cover the LEDs during operation.
- Stop use if you experience persistent discomfort or skin irritation.
- Keep out of reach of children unless supervised.
- Consult a healthcare professional if you have a medical condition or use photosensitizing medications.