About the research on this page. The studies cited here investigate photobiomodulation (PBM) as a therapeutic modality and the specific wavelengths used in PBM research — not Mito Red Light devices. The wavelengths in our panels were chosen because the peer-reviewed PBM literature supports them. Evidence levels and study counts reflect the broader research base, not studies of our products. See the full methodology note at the bottom of this page.

Red Light Therapy for Wound Healing: Clinical Evidence & Research

961 StudiesPhotobiomodulation (PBM) Source-linked

What the research shows

Our evidence rating: Moderate for diabetic foot ulcers and surgical wounds; no benefit shown for venous leg ulcersUpdated Reviewed by Alexis Cowan, PhD

Light therapy helps some wounds heal faster, especially surgical wounds and early-stage diabetic foot ulcers. A 2026 meta-analysis of 56 trials (4,920 patients) found that near-infrared light improved surgical wound healing and reduced pain after surgery, with the best results at 700 to 850 nm and 4 to 10 sessions, though certainty was very low (Liu 2026). In grade I to II diabetic foot ulcers, 11 studies (657 participants) found more complete healing, greater wound shrinkage and fewer infections (Chen 2025). A 2025 network meta-analysis of 99 trials ranked low-level laser highest of 12 treatments for shrinking diabetic foot ulcer area (Hu 2025).

Not every wound responds. For venous leg ulcers, a 2026 meta-analysis found no significant reduction in ulcer area (Rasul 2026). For pressure ulcers, a review of 5 trials found healing similar to standard care except with one red-laser protocol (Petz 2020).

Based on 961 indexed studies in this category, 202 of them in people. These studies test photobiomodulation in general, not Mito Red Light devices.

Evidence by condition

Number of studies in our database for each condition. Direction and certainty are shown only where a meta-analysis or systematic review reports them; otherwise the row says "not graded".

ConditionHuman randomized trialsAll human studiesDirection of resultsCertainty
Diabetic foot ulcer 27 45 More complete healing in grade I-II ulcers
Chen 2025 (PMID 40186874); Hu 2025 (PMID 40821981)		 Not graded by authors
Chronic 6 27 Not graded Not graded
Venous ulcer 12 23 No significant reduction in ulcer area
Rasul 2026 (PMID 41889013)		 Low confidence (risk of bias)
Burns (clinical) 6 18 Not graded Not graded
Pressure ulcer 12 15 Similar to standard care overall
Petz 2020 (PMID 31550398)		 Low methodological quality
Cardiac surgery 9 13 Not graded Not graded
Wound healing 1 14 Not graded Not graded
Graft donor site 2 5 Not graded Not graded
Diabetic foot ulcer: PDT clinical studies 4 5 Not graded Not graded
Knee arthroplasty 3 4 Not graded Not graded
Abdominal surgery 2 3 Not graded Not graded
Rhinoplasty 3 3 Not graded Not graded

Key studies: Wound Healing

The strongest human evidence: systematic reviews and meta-analyses first, then the newest randomized trials. Each card comes straight from our study database and links to the paper.

Meta-analysis

Effects of Near Infrared Light on Surgical Wound Healing: A Systematic Review and Meta-Analysis

et al., Int Wound J, 2026. PMID 41605843

Key finding (checked against the abstract)56 trials (4,920 patients), 35 pooled. Near-infrared light improved surgical wound healing (SMD 0.78) and reduced post-operative pain (SMD 0.71). Best results at 700-850 nm and 4-10 sessions. Very low certainty.
Meta-analysis

The Healing Effect of Photobiomodulation on Venous Leg Ulcers: A Systematic Review and Meta-Analysis

et al., Wound Repair Regen, 2026. PMID 41889013

Key finding (checked against the abstract)11 trials; 4 pooled for venous leg ulcers. No significant reduction in ulcer area versus controls (p = 0.37).
Meta-analysis

Intervention effects of low-level laser therapy (LLLT) on grade I-II ulcers in diabetic foot patients: A meta-analysis

et al., Wound Repair Regen, 2025. PMID 40186874

Key finding (checked against the abstract)11 studies, 657 participants with grade I-II diabetic foot ulcers. More complete healing (RR 4.97), more wound shrinkage, better bacterial clearance and fewer infections.
Population
Human
Meta-analysis

Comparison of the efficacy of 12 interventions in the treatment of diabetic foot ulcers: a network meta-analysis

et al., PeerJ, 2025. PMID 40821981

Key finding (checked against the abstract)Network meta-analysis of 99 randomized trials (7,356 patients) comparing 12 diabetic foot ulcer treatments. Low-level laser ranked first for percent area reduction; other treatments ranked higher for complete healing and healing time.
Meta-analysis

The Effects of Low-Level Laser Therapy on Wound Healing and Pain Management in Skin Wounds: A Systematic Review and Meta-Analysis

et al., Cureus, 2024. PMID 39610644

Key finding (checked against the abstract)18 randomized trials. Greater reduction in wound size, a higher rate of healing and less pain with low-level laser.
Systematic review

Effect of Photobiomodulation on the Repair of Pressure Ulcers in Adult and Elderly Patients: A Systematic Review.

et al., Photochem Photobiol, 2020. PMID 31550398

Key finding (checked against the abstract)5 randomized trials in pressure ulcers. One 658 nm laser protocol improved complete healing, but time to healing and area reduction were similar to standard care overall.
Population
Human

Studies that found no effect

Not every trial is positive. "No effect" means the main outcome did not differ from sham or control. "Mixed" means some outcomes improved but the outcome named here did not differ.

YearStudyDesignResultOutcome with no difference
2026 The Healing Effect of Photobiomodulation on Venous Leg Ulcers: A Systematic Review and Meta-Analysis Meta-analysis No effect Venous leg ulcer healing
2025 Photobiomodulation in wounds of individuals with diabetes: a nonrandomized pilot study Human study, n = 25 No effect Wound area and inflammatory gene expression between groups (non-randomized)
2025 The Impact of Photobiomodulation Therapy on Swelling Reduction and Recovery Enhancement in Total Knee Arthroplasty: A Randomized Clinical Trial RCT, n = 30 Mixed Range of motion and pain after knee replacement (swelling reduced)

Latest human studies: Wound Healing

The 25 most recent human studies in our database for this category.

YearStudyDesignPopulation
2026 Can Photobiomodulation improve healing of category II-III pressure ulcers in frail older adults? A quasi-experimental 24-month follow-up study. Human study Human
2026 Blue-Light Photobiomodulation in Pediatric Burns: Inflammation, Healing, and Early Scar Outcomes in a Retrospective Historical Cohort. Human study Human: 84 participants
2026 Effect of photobiomodulation therapy on regulating reparative processes of chronic wounds at the inflammation stage. Human study Human
2026 Clinical safety and tolerability of repeated high-fluence 405 nm blue light exposure in chronic wounds Single-arm study, n = 22 Human: Single-arm study; 22 participants
2026 The Immediate, Short-Term and Long-Term Effects of Photobiomodulation on Chronic Post-Surgical Pain After Tympanomastoidectomy Surgery RCT, n = 138 Human: Randomized trial; 138 participants
2026 Nursing-Integrated Photobiomodulation Therapy for Post-Sternotomy Pain Management: A Retrospective Analysis of Acute Pain Alleviation and Opioid Sparing in a Single-Center Cohort Human study, n = 264 Human: Retrospective study; 264 patients
2026 Photobiomodulation therapy and postoperative recovery after abdominoplasty: a non-randomized pilot study Human study, n = 31 Human: Non-randomized study; 31 participants
2026 Consensus on energy-based devices for keloids and hypertrophic scars: A Latin American Delphi study. Human study Human
2026 Case series on photobiomodulation in wound care: hard-to-heal leg ulcers and radiation-induced fibrosis Case series, n = 4 Human: Case series; 4 patients
2026 Low-level laser therapy and conventional treatment for diabetic foot ulcers: a case series Case series, n = 11 Human: Case series; 11 patients (5 usual care & 6 usual+PBM)
2026 Hyperbaric Oxygen Therapy Combined with Polarized Light Therapy on Neuropathic Foot Ulcer: A Randomized Controlled Study RCT, n = 40 Human: Randomized trial; 40 participants
2026 Adjuvant visible incoherent polarised phototherapy in chronic skin defects: a single-arm prospective observational cohort study Single-arm study, n = 50 Human: Single-arm study; 50 participants
2026 Comparison of Safe Laser 1800 Infra and Standard Treatment for Chronic Non-Healing Wounds Human study, n = 10 Human
2026 Deep Learning-Based OCT Segmentation for Stiffness Quantification in Evaluating Low-Level Laser Therapy for Wound Healing Single-arm study, n = 14 Human: Single-arm study; 14 participants
2026 Advancements with Photobiomodulation in Post-Burn Management/Rehabilitation: A Comparative Study on Multiwave Locked System (MLS) LASER Therapy Outcomes Single-arm study, n = 35 Human: Single-arm study + historical ctrls; 35 participants (+ 30 ctrls)
2026 The clinical and cost analysis of laser therapy for healing hard-to-heal leg ulcers: a self-control service evaluation study Human study, n = 20 Human: 20 participants; comparison study, non-randomized
2026 High-intensity light therapy for post-interventional complications and pain after minimally invasive spinal procedures: a case series Case series, n = 32 Human: 32 patients; case series (two cohorts: 16 LLLT and 16 controls)
2026 Post Fournier gangrene raw areas in the penis or scrotum: the role of intense pulsed light and radiofrequency in conservative treatment. Human study Human
2026 Photobiomodulation Reduces the Microbial Load of Acute Burn Wounds in the Burns Outpatient Department Human study Human
2025 Photobiomodulation in wounds of individuals with diabetes: a nonrandomized pilot study Human study, n = 25 Human: Non-randomized study, controlled; 25 participants
2025 Post-otoplasty keloid scars - treatment strategies and case reports. Case report Human
2025 Effect of Low-Level Laser Therapy on Donor Site Burn Wound Healing in Pediatric Patients: A Randomized Controlled Trial RCT, n = 40 Human (pediatric): 40 participants; randomized trial; 3 weeks
2025 Evaluation of the Effect of Light Emitting Diodes Therapy (LEDT) to Reduce the Recovery Period of Rhinoplasty RCT, n = 60 Human: 60 participants; randomized trial; 14-day treatment / 1-month study
2025 Endolaser-Induced Cutaneous Necrosis: A Case Report. Case report Human
2025 An Innovative Dual-Modality Approach Using Laser and Plasma Therapy in the Management of Chronic Diabetic Foot Ulcer With Osteomyelitis: A Case Series Case series, n = 2 Human: 2 patients; case series (of PBM+plasma therapy)

Light parameters used in the trials

Wavelengths reported in our database for the 98 human randomized trials in this category (70 wavelength entries; many database records lack a wavelength, and some trials report more than one). This describes the research; it is not a dosing recommendation.

Wavelength bandTimes used in trials
Red (600-699 nm)30
Blue/green (400-599 nm)15
Near-infrared (800-899 nm)14
Near-infrared (900-1200 nm)10
Deep red/near-infrared (700-799 nm)1

Most common wavelengths: 660-669 nm, 630-639 nm, 940-949 nm, 650-659 nm, 400-409 nm.

What the evidence does not show

  • Faster healing of venous leg ulcers: no significant reduction in ulcer area (Rasul 2026, PMID 41889013).
  • Better pressure ulcer healing than standard care overall: time to healing and area reduction were similar (Petz 2020, PMID 31550398).
  • Consistent effects on swelling, scarring or inflammation after surgery: results were inconsistent (Liu 2026, PMID 41605843).
  • That light beats every other diabetic foot ulcer treatment: other therapies ranked higher for complete healing and healing time (Hu 2025, PMID 40821981).

Frequently asked questions

Does red light therapy help wounds heal?

For some wounds. Near-infrared light improved surgical wound healing and pain across 35 pooled trials (Liu 2026), and low-level laser improved healing of early-stage diabetic foot ulcers (Chen 2025).

Which wavelengths were used for wound healing?

In the surgical wound meta-analysis, the best results came from 700 to 850 nm near-infrared light, 4 to 10 sessions and non-contact application (Liu 2026).

Does it help venous leg ulcers?

Not according to a 2026 meta-analysis, which found no significant reduction in ulcer area (Rasul 2026).

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Browse All Wound Healing Studies

All 961 studies in this category from our study database, built on the PBM Research Database by Vladimir Heiskanen.

Search every study across all categories: Open the Full Evidence Explorer →

Methodology & important context

The published research indexed and referenced on this page studies photobiomodulation (PBM) as a therapeutic modality and the specific wavelengths used in those studies — not Mito Red Light devices specifically. The wavelengths used across our panels were chosen because the peer-reviewed PBM literature supports them: this is where published evidence is deepest, where dosing parameters have been characterized in human studies, and where clinical guidelines (such as WALT for inflammation and pain) exist. Mito Red Light has not funded or conducted registered clinical trials on our specific devices, and the study counts referenced here reflect the broader PBM research base — not studies of our products.

Where review authors graded certainty (for example with GRADE), we report their grade; other ratings are Mito’s summary. Study counts reflect peer-reviewed photobiomodulation research drawn from major scientific literature databases, peer-reviewed journals, and other published research repositories. PBM response varies meaningfully by person, tissue, condition, dose, wavelength, and session timing; outcomes reported in the published literature may not be replicable for every user. Mito Red Light devices are not intended to diagnose, treat, cure, or prevent any disease. If you have a medical condition or are under a physician’s care, please consult your healthcare provider before beginning any photobiomodulation regimen.