Red Light Therapy

What is Red Light Therapy?

Red Light Therapy (RLT), also called photobiomodulation (PBM), uses low-level red and near-infrared wavelengths (commonly in the ~630–850 nm range) to stimulate cellular processes. Light energy is absorbed by cells and can support mitochondrial function, which in turn can reduce inflammation and encourage tissue repair.

Potential benefits (what it's commonly used for)

• Reduction of localized inflammation and pain (musculoskeletal and soft tissue).
• Support for soft tissue healing and recovery after injury or overuse.
• Skin improvements: collagen stimulation, reduced fine lines, improved texture and scar appearance.
• Adjunctive support for wound healing and certain chronic pain conditions when used under clinical guidance.

What the evidence says

RLT/PBM is an emerging therapy with an increasing number of clinical and preclinical studies. Systematic reviews and randomized trials report benefit for some indications (for example certain chronic pain and soft tissue conditions), but results can vary depending on device wavelength, dose, treatment schedule, and the condition treated. In short: promising evidence exists, but clinical effect sizes and protocols are still being refined.

How it works (brief)

RLT delivers photons that are absorbed by cellular chromophores (notably within mitochondria). That absorption can increase cellular energy (ATP) and influence signaling pathways tied to inflammation, blood flow, and tissue repair. Treatment depth depends on wavelength (near-infrared penetrates deeper than visible red).

What to expect during a session

1. Sessions are typically short (several minutes to ~10 minutes per area) and painless.
2. Providers position a panel or wand over the target area; protective eyewear may be used depending on the device.
3. Many protocols use multiple sessions per week for several weeks to see cumulative benefits.

Safety & precautions

RLT is generally well tolerated and low risk when used properly. However, considerations include:

• Protect eyes — avoid looking directly into high-power LED/ sources; wear eye protection if recommended.
• People taking photosensitizing medications, with certain skin conditions, or with active malignancy near the treatment area should consult a clinician before treatment.
• Device dose (fluence) and correct wavelength matter — improperly dosed treatments are less effective or could cause unwanted effects. Always follow clinician guidance or manufacturer instructions for home devices.

Who it may help

RLT is commonly offered as part of multi-modal chiropractic and rehabilitation programs for patients with localized musculoskeletal pain, soft tissue injuries, or those seeking non-invasive skin rejuvenation. It is typically considered an adjunct (not a sole) therapy.

Frequently asked questions

How many treatments will I need?

Protocols vary. Many patients undergo several sessions per week for 4–8 weeks, then reduce frequency as symptoms improve.

Is it painful?

No — treatments are painless and reported as comfortable by most patients.

Are at-home devices effective?

Some low-power home devices can provide benefits when used consistently, but many clinical devices deliver higher, better-controlled doses. Discuss device selection and expectations with your provider.