How Does Red Light Therapy Actually Work?

The science behind this increasingly popular wellness tool

Red light therapy (RLT) is gaining momentum as a safe, non-invasive method for promoting skin health, enhancing recovery, and supporting overall cellular function. But how exactly does it work?

What Is Red Light Therapy?

Red light therapy (also known as low-level light therapy or photobiomodulation) involves exposing the body to specific wavelengths of red (600–700 nm) and near-infrared (700–850 nm) light. These wavelengths penetrate the skin and deeper tissues, triggering biological responses at the cellular level.

How Red Light Affects Your Cells

At the heart of red light therapy’s mechanism is its effect on mitochondria. When red or near-infrared light penetrates tissue, it is absorbed by cytochrome c oxidase, an enzyme that helps boost the production of adenosine triphosphate (ATP).

Reference: Hamblin MR. AIMS Biophysics, 2017

What Are the Proven Benefits of Red Light Therapy?

1. Skin Health & Appearance

RLT can support collagen production, wound healing, and reduced inflammation.

Study: Lee SY et al., Photomed Laser Surg, 2007

2. Muscle Recovery & Performance

RLT helps reduce soreness, fatigue, and supports muscle regeneration.

Study: Leal Junior EC et al., J Athl Train, 2015

3. Joint Support & Inflammation Modulation

Red light therapy may reduce stiffness and support healthy joint function.

Study: Stausholm MB et al., BMJ Open, 2019

Red Light vs Heat Therapy

Red light therapy works through light—not heat. It doesn't raise core temperature but instead stimulates biological processes at the cellular level.

Wavelength, Intensity, and Consistency

Red light therapy is most effective when used consistently, with proper dosage and within optimal wavelength ranges (630–670 nm red; 810–850 nm NIR).

Reference: Huang YY et al., Dose-Response, 2009

Choosing the Right Device

The HELIOS range is in effect the same specification across the range, they are simply differently sized. This then depends on what you want to use it for. For more localised uses, such as on the face, then the 300w is perfect, but if you want to maximise the all around benefits of red light therapy then we would always recommend one of the full body units.

Final Thoughts

Red light therapy supports mitochondrial function and cellular energy production. It’s a promising wellness tool when used consistently and correctly—but it’s not a miracle cure. As always, consult with a healthcare professional before starting any new routine.

Disclaimer:

This article is for educational purposes only and does not offer medical advice. Always speak with a medical professional before starting new therapies.