The Difference Between Red Light (RED LED) and Near Infrared (NIR – Near Infrared)

Both types of light are used in light therapy (RLT – Red Light Therapy), but they differ in wavelength and how deeply they penetrate body tissues.

Infrared Therapy

Treatment with Infrared Light

Infrared therapy is an innovative treatment method based on the use of infrared light to stimulate the body’s natural regeneration processes. Clinical studies confirm its effectiveness in relieving pain, improving circulation, accelerating metabolism, and supporting detoxification.

It has been proven that infrared therapy helps regenerate the skin, reduce inflammation, and speed up muscle recovery. Its ability to deeply penetrate tissues enables targeted action, making it an excellent choice for those seeking natural support for health and overall well-being.

1. Red Light (RED LED)

  • Wavelength: 600–700 nm (most commonly 630 nm and 660 nm)

  • Visibility: Yes – red light is visible to the human eye

  • Penetration depth: 5–10 mm – primarily affects the surface of the skin

Applications:

  • Stimulates collagen production – improves skin elasticity and reduces wrinkles

  • Accelerates wound healing and reduces skin inflammation (e.g. acne, psoriasis)

  • Enhances microcirculation – improves oxygenation and nutrition of skin tissues

  • Helps reduce scars and discoloration

2. Near Infrared (NIR – Near Infrared)

  • Wavelength: 700–1100 nm (most commonly 810 nm, 850 nm, 940 nm)

  • Visibility: No – infrared light is invisible to the human eye

  • Penetration depth: 20–50 mm – reaches deeper tissues such as muscles, joints, and even internal organs

Applications:

  • Reduces inflammation and relieves joint and muscle pain

  • Speeds up post-injury and post-exercise recovery

  • Enhances mitochondrial function in deeper tissues

  • May provide neuroprotective effects – supports brain health and may reduce the risk of neurodegenerative diseases

  • Increases nitric oxide (NO) production, improving blood flow

Which one should you choose? Ideally, both.

  • If your goal is to improve skin appearance, reduce scars, or promote wound healing → Choose RED LED (630–660 nm)

  • If your goal is deep tissue regeneration, pain reduction, or boosting mitochondrial performance → Choose NIR (810–850 nm)

Many modern devices combine both wavelengths to provide dual-action treatment — targeting both the surface and deeper layers of the body.