Red light therapy,
backed by research.
Wavelength science, clinical evidence for 60+ conditions, independent device testing, and dosing protocols. Every claim traced to its primary source.
Explore by topic
Every section built on primary research. Browse the science, find your condition, or compare devices.
Wavelength Science
Every nm from 620 to 1100 — absorption spectra, penetration depths, clinical applications.
Skin & Anti-Ageing
Acne, wrinkles, rosacea, eczema, psoriasis, scars — evidence ratings for 20+ conditions.
Pain & Recovery
Arthritis, neuropathy, muscle recovery, wound healing — clinical trial evidence reviewed.
Device Comparisons
Joovv, Mito Red, PlatinumLED, Hooga — irradiance-tested, independently compared.
Protocols & Safety
Dosing, distance, session length, contraindications, and medication interactions.
Research & Evidence
Meta-analyses, clinical trials, NASA origins, and how to evaluate PBM study quality.
Every claim cited
Health claims link to PubMed, clinical registries, or peer-reviewed journals. No hand-waving.
Evidence quality rated
Strong, moderate, limited, or insufficient. Evidence quality is labelled clearly, not buried.
Devices independently tested
Recommendations based on irradiance data, wavelength accuracy, and build quality — not sponsorships.
One mechanism, three effects
Red and near-infrared photons penetrate tissue and interact with cytochrome c oxidase (Complex IV of the mitochondrial electron transport chain). This single interaction triggers three downstream effects that explain why PBM works across seemingly unrelated conditions.
Increased ATP production
More cellular energy — the fuel for repair, regeneration, and normal function.
Nitric oxide release
Vasodilation improves local blood flow, delivering oxygen and nutrients to tissue.
Reduced oxidative stress
Modulates ROS signalling, reducing NF-κB activation and pro-inflammatory cytokines.
Not all red light is therapeutic
Wavelength determines everything — how deep light penetrates, which tissues it reaches, and what biological effects it triggers. The research centres on two optical windows:
Visible Red (620–700nm)
Penetrates 1–3mm. Targets skin, superficial wounds, collagen. 660nm is the most studied wavelength.
Near-Infrared (700–1100nm)
Penetrates 3–50mm. Reaches joints, muscle, bone, brain. 850nm dominates the NIR research.
What the research actually supports
Evidence quality varies dramatically across conditions. Here is an honest assessment based on systematic reviews and meta-analyses.
Multiple RCTs and meta-analyses
Multiple studies, promising results
Preliminary — needs more research
Choose the right device type
Prices range from £30 LED masks to £5,000+ full-body systems. What matters is wavelength, irradiance, and coverage — not brand marketing.
Panels
£150–£2,000
Face Masks
£50–£500
Wraps & Belts
£50–£300
Handheld
£30–£200
Beds & Pods
£3,000–£50,000
Caps & Helmets
£200–£1,000
Basic protocol
Red light therapy has an excellent safety profile. Unlike UV tanning beds, it does not cause DNA damage, sunburn, or increase skin cancer risk. But more is not always better — the biphasic dose response means excessive use can diminish benefits.
Full protocols & safety guideFrom device surface. Follow manufacturer specs.
Per area per session. Skin conditions: shorter. Deep tissue: longer.
Daily is safe but not always more effective.
Light cannot penetrate fabric effectively.
Required for high-powered panels. Not needed for body wraps.
Aligns with circadian biology. Evening OK but avoid blue-enriched devices before bed.
The science is real. The marketing often isn't.
Every page on RedLightTherapy.expert cites primary sources, rates evidence quality, and recommends devices based on specs — not sponsorship deals.