Red Light Therapy / Photobiomodulation
Exposure to specific wavelengths of red (630–700nm) and near-infrared (700–1100nm) light that penetrate skin and tissue to stimulate cellular energy production and healing.
How it works
Photons are absorbed by cytochrome c oxidase in the mitochondrial electron transport chain, increasing ATP production. Also triggers nitric oxide release (vasodilation), reduces reactive oxygen species, and activates anti-inflammatory pathways including NF-κB suppression.
Reported benefits
- Skin collagen stimulation and anti-aging
- Wound healing and post-procedure recovery
- Joint pain and arthritis relief
- Muscle recovery and performance
- Hair regrowth (LLLT devices FDA-cleared)
- Reduced inflammation and swelling
- Mood improvement and seasonal affective disorder
Regulatory status
Approved for: Wound healing, Pain management, Dermatological conditions, Hair loss
LLLT devices CE-marked as medical devices (Class II/IIa). Widely used in physiotherapy and dermatology across EU. Some home devices CE-marked for consumer use.
Approved for: Pain relief, Wound healing, Hair loss
LLLT devices registered with MHRA as medical devices. Used in NHS physiotherapy for wound healing and pain. Consumer LLLT devices available OTC for hair loss and pain relief.
Approved for: Hair loss (androgenic alopecia) — FDA cleared, Pain relief — FDA cleared, Acne treatment — FDA cleared, Wound healing — FDA cleared
Multiple LLLT/LED devices FDA 510(k) cleared for specific indications (hair growth, pain, acne). Over-the-counter devices FDA-cleared for home use (HairMax, iGrow). Anti-aging and general wellness claims require 510(k) clearance or are wellness claims only.
Practical details
Frequency: 3–5 sessions per week for 8–12 weeks; ongoing 2–3x weekly for maintenance
Results last: Sessions are 10–20 minutes; cumulative benefits build over weeks
Contraindications:
- Active cancer (light may stimulate tumor growth — consult oncologist)
- Photosensitizing medications (tetracyclines, St. John's Wort)
- Epilepsy (flickering light triggers)
- Direct eye exposure without protection
- Thyroid conditions (avoid neck exposure with high-powered devices)
Always consult a licensed medical professional before undergoing any treatment. This information is educational only and does not constitute medical advice.