What Is Red Light Therapy?

Red light therapy is a wellness method that applies low-power red and near-infrared light to the human body to improve cellular function. It is a natural, drug-free alternative for individuals seeking to enhance biological efficiency through light exposure. The therapy relies on specific wavelengths between 630 nanometers (nm) and 850 nm, which are visible as deep red light or felt as invisible near-infrared energy.

There are 3 primary characteristics of red light therapy:

• Non-invasive: The light passes through the skin layers without requiring incisions or injections.
• Non-thermal: The LEDs do not emit significant heat, which distinguishes them from infrared saunas or heat lamps.
• Non-UV: The devices do not contain ultraviolet (UV) rays, which eliminates the risk of tanning or DNA damage.

Red light therapy belongs to a broader category of light-based care found in red light therapy.

People use red light therapy to support the body's natural recovery processes and maintain overall physical health. The application of light serves as a versatile tool for various lifestyle and wellness goals.

There are 4 main reasons for using red light therapy:

1. Skin health: Users apply light to manage the appearance of skin and support a clear, youthful complexion.
2. Physical recovery: Athletes use red light to assist the body in recovering after intense exercise or physical exertion.
3. Pain support: Individuals use the therapy to provide comfort and relief to localized areas of the body.
4. General wellness: Many incorporate light sessions into a daily routine to promote vitality and mood balance.

For more specific information on these applications, see red light therapy benefits.

Red light therapy works by delivering concentrated light energy directly to the body's cells to support natural energy production. When these light particles, known as photons, touch the skin, they are absorbed by the tissue layers.

The process follows a logical sequence:

• Absorption: The skin and underlying tissues absorb the red and near-infrared wavelengths.
• Interaction: The light interacts with light-sensitive components within the cells.
• Stimulation: This interaction encourages the cells to function more efficiently and repair themselves.

This mechanism does not rely on damaging the tissue to trigger a healing response. Instead, it provides a supportive environment for cellular activity. To understand the deeper science of this process, visit photobiomodulation.

Red light therapy and photobiomodulation are the same process referred to by different names depending on the context. Photobiomodulation (PBM) is the formal scientific term used in clinical research and academic settings, while red light therapy is the consumer-friendly name.

The term photobiomodulation is defined by 3 components:

1. Photo: Light energy or photons.
2. Bio: The biological tissue being treated.
3. Modulation: The influence or change of a biological process.

Therefore, red light therapy describes the tool, while photobiomodulation describes the biological action. Detailed definitions are available at photobiomodulation basics.

Red light therapy is widely considered safe for most people when used according to manufacturer guidelines. It does not use ionizing radiation or high temperatures that could damage skin cells.

The safety of the therapy is defined by 3 primary factors:

• Zero UV Radiation: No DNA damage or skin cancer risk associated with sunbeds.
• No Chemicals: No drugs or synthetic substances are involved.
• Minimal Side Effects: Most users experience no adverse reactions when used correctly.

To learn about specific safety precautions and eye protection, view the safety guide.

Red light therapy is not a medical cure, a tanning method, or a heat-based thermal treatment. Understanding its limitations helps set realistic expectations.

• Not a cure: It does not replace medical treatment or surgery.
• Not heat therapy: It does not raise core body temperature or induce sweating.
• Not tanning: It contains no UVA or UVB rays.
• Not instant: Results require consistent use over time.
• Not a laser: Most devices use LEDs rather than high-powered lasers.

Understanding the basics of red light therapy is the first step in optimizing its use for long-term health. Learn more in the red light therapy basics guide.

• Mechanisms: Learn how red light therapy works.
• Science: Explore different wavelengths.
• Usage: Review recommended safety protocols.