# The science behind the conversation
Kineon research companion · Private editorial draft · 22 October 2026

Selected positive findings and related physiological context, not a comprehensive or balanced review. Each study is labeled by model, design and protocol. This is not a MOVE+ clinical-trial collection. Educational context, not a treatment guide.

## 01. Ultrasonographic evaluation of plantar fasciitis after low-level laser therapy: results of a double-blind, randomized, placebo-controlled trial.
Kiritsi et al. · 2010 · Human randomized trial
https://pubmed.ncbi.nlm.nih.gov/19841862/
DOI: 10.1007/s10103-009-0737-5

Studied: 30 adults enrolled; 25 completed
Design: 904 nm laser versus placebo; six-week treatment
Finding: Pain and ultrasound measures at six weeks.
Study scope: Double-blind placebo comparison with 25 completers from 30 enrolled; six-week pain and ultrasound assessment.
Match: Published six-week plantar fasciitis trial.

## 02. Low-Level Laser Therapy at 635 nm for Treatment of Chronic Plantar Fasciitis: A Placebo-Controlled, Randomized Study.
Macias et al. · 2015 · Human randomized trial
https://pubmed.ncbi.nlm.nih.gov/25769363/
DOI: 10.1053/j.jfas.2014.12.014

Studied: 69 participants: 37 active, 32 placebo
Design: 635 nm laser; six sessions over three weeks versus placebo
Finding: Mean pain improvement: 29.6/100 active versus 5.4/100 placebo. The difference in improvement is 24.2/100, or 2.42 points on a 0–10 scale.
Study scope: Randomized placebo comparison; manufacturer involvement disclosed in the study. Chart values are converted from the reported 0–100 scale.
Match: Published plantar fasciitis trial with assessments through week eight.

## 03. Low-level laser therapy in meniscal pathology: a double-blinded placebo-controlled trial.
Malliaropoulos et al. · 2013 · Human placebo-controlled trial
https://pubmed.ncbi.nlm.nih.gov/23093133/
DOI: 10.1007/s10103-012-1219-8

Studied: Patients with selected symptomatic meniscal pathology
Design: Double-blind, placebo-controlled low-level laser trial
Finding: At four weeks, mean Lysholm score was 82.5 with laser versus 79.0 with placebo, from baselines of 77.0 and 77.2. Pain improvement favored laser (p<0.0001).
Study scope: Selected symptomatic MRI-defined meniscal lesions; outcomes focused on pain and patient-reported knee function.
Match: Clinical symptom and function evidence in meniscal pathology.

## 04. Exploring the Effects of 630 nm Wavelength of Light-Emitting Diode Irradiation on the Proliferation and Migration Ability of Human Biceps Tendon Fibroblast Cells.
Ryu et al. · 2023 · Human primary cell culture
https://pmc.ncbi.nlm.nih.gov/articles/PMC9880516/
DOI: 10.4055/cios22132

Studied: Biceps tendon fibroblasts from two male surgical donors, aged 42 and 69; three independent experiments
Design: One 20-minute LED exposure: 630 nm, 10 mW/cm², 100 Hz, alone or with 880 nm, 40 mW/cm², 100 Hz.
Finding: BrdU proliferation at approximately 24 hours: 2.21±0.76× control with red; 2.87±0.91× with combined light. Migration: 3.06±0.21× and 2.88±0.20× control. All p<0.05.
Study scope: DNA-synthesis and migration assays in cultured human tendon-derived cells; donor count is distinct from experimental replicates.
Match: Selected positive finding; source-specific model and endpoint.

## 05. Near-infrared photobiomodulation stimulates viability and cartilage matrix synthesis in human chondrocytes.
Oliveira et al. · 2025 · Human primary cell culture
https://www.nature.com/articles/s41598-025-28792-y
DOI: 10.1038/s41598-025-28792-y

Studied: Healthy knee chondrocytes from one 46-year-old female donor; at least three independent experiments
Design: 940 nm LED, 17 mW/cm² continuous, 180 seconds daily for seven days; calculated 3.06 J/cm² per session.
Finding: Aggrecan protein by western blot reached 1.4× untreated control (p=0.001); sulfated glycosaminoglycan deposition increased (p<0.001). Across selected protocols, extracellular staining increased 1.3–1.5× for collagen-II and 1.5–2.1× for aggrecan.
Study scope: The 940-nm result is a matrix-production endpoint. The staining ranges combine several favorable protocols and are assay-specific.
Match: Selected positive finding; source-specific model and endpoint.

## 06. Promoted Viability and Differentiated Phenotype of Cultured Chondrocytes With Low Level Laser Irradiation Potentiate Efficacious Cells for Therapeutics.
Yang et al. · 2020 · Rabbit primary cells + human cell-line checks
https://www.frontiersin.org/journals/bioengineering-and-biotechnology/articles/10.3389/fbioe.2020.00468/full
DOI: 10.3389/fbioe.2020.00468

Studied: Passage-3/4 chondrocytes from three-week-old rabbits; selected gene effects checked in human C28/I2 cells
Design: 632.8 nm He-Ne laser, reported 12 mW over 0.91 cm²; eight minutes daily, reported 5.74 J/cm². Molecular assays followed one, three or five days.
Finding: After five days: COL-II protein increased (p<0.05); Acan, Col2a1, Sox9 and CTNNB1 transcription increased (p<0.01). Matrix staining increased; secreted GAG was higher during days 8–12 after a six-day treatment course.
Study scope: Cell-culture phenotype, gene expression and matrix measurements; fluence is reported as specified by the authors.
Match: Selected positive finding; source-specific model and endpoint.

## 07. Optimizing LED photobiomodulation parameters to prevent cartilage matrix degradation in knee osteoarthritis: in vitro and in vivo study.
Fan et al. · 2025 · Mouse osteoarthritis experiment
https://pmc.ncbi.nlm.nih.gov/articles/PMC12570694/
DOI: 10.1186/s13018-025-06341-7

Studied: Male C57BL/6 mice with surgically destabilized medial meniscus; five mice in the successful arm and five untreated OA controls
Design: 940 nm LED, 44 mW/cm², reported 52 J/cm², 20 minutes, three times weekly for six weeks; started one week after surgery.
Finding: OARSI histological damage score was 50% lower than untreated OA controls (p=0.03). Weight-bearing asymmetry improved by 31% (p=0.03). Collagen-II staining increased and MMP3-positive cells decreased.
Study scope: Animal cartilage preservation assessed in stained tissue sections; companion rat-cell assays measured matrix synthesis and degradation genes.
Match: Selected positive finding; source-specific model and endpoint.

## 08. Effects of Photobiomodulation Adjunct Therapy via Superpulsed 904 nm Laser in Patients With Second-Degree Burns: Randomized Controlled Clinical Trial.
Yadav et al. · 2025 online / 2026 issue · Human randomized sham-controlled trial
https://onlinelibrary.wiley.com/doi/10.1002/jbio.202500386
DOI: 10.1002/jbio.202500386

Studied: 24 people with second-degree burns; 12 active and 12 sham
Design: 904 nm superpulsed laser, 100 Hz, 200-nanosecond pulses; ten minutes, 1.1 J/session, twice weekly. Both groups received silver-sulfadiazine/paraffin-gauze care.
Finding: Re-epithelialization: 8.3 versus 12.6 days (p<0.05), a calculated 4.3-day difference and 34% shorter time. Wound reduction, granulation and pain also improved.
Study scope: Clinical skin-wound closure endpoint with concurrent standard care.
Match: Selected positive finding; source-specific model and endpoint.

## 09. Efficacy of Light-Emitting Diode-Mediated Photobiomodulation in Tendon Healing in a Murine Model.
Lim et al. · 2025 · Mouse Achilles-injury experiment
https://pmc.ncbi.nlm.nih.gov/articles/PMC11899806/
DOI: 10.3390/ijms26052286

Studied: Male BALB/c mice: 13 healthy, 13 injured and 14 injured-plus-LED animals across experiments; representative histology plots generally four per group.
Design: Methods report 630/880 nm LEDs, 10/40 mW/cm², 100 Hz, 20 minutes, reported 12/48 J/cm², daily for two weeks beginning 24 hours after injury.
Finding: Day-14 fiber-structure and fiber-arrangement scores improved versus injured untreated controls (p<0.005). Collagen-I:III ratio moved toward healthy levels; collagen-III and TGF-β1 decreased.
Study scope: Microscopic tissue organization and collagen-expression endpoints after surgically induced Achilles injury in mice.
Match: Selected positive tendon histology and extracellular-matrix findings.

## 10. Effect of low-level laser therapy on the expression of inflammatory mediators and on neutrophils and macrophages in acute joint inflammation.
Alves et al. · 2013 · Animal experiment
https://link.springer.com/article/10.1186/ar4296
DOI: 10.1186/ar4296

Studied: 60 male Wistar rats with induced acute knee inflammation
Design: 808 nm laser, 4 J, at 50 or 100 mW; induced joint inflammation with injured untreated and uninjured controls.
Finding: Inflammatory-cell counts and selected cytokine measures at 24 hours.
Study scope: Papain-induced acute knee inflammation in male Wistar rats; responses were measured by cell counts and cytokine assays.
Match: Preclinical evidence for inflammatory modulation.

## 11. An Anterior Cruciate Ligament Rupture Increases Levels of Urine N-terminal Cross-linked Telopeptide of Type I Collagen, Urine C-terminal Cross-linked Telopeptide of Type II Collagen, Serum Aggrecan ARGS Neoepitope, and Serum Tumor Necrosis Factor–α.
Hagemans et al. · 2021 · Human prospective cohort
https://journals.sagepub.com/doi/10.1177/03635465211042310
DOI: 10.1177/03635465211042310

Studied: 152 ACL-injured participants; 16 knee-healthy cytokine-reference participants
Design: Prospective follow-up after ACL injury; nonrandomized comparison with reference participants
Finding: Serum TNF-α was 1.5-fold higher at a median 11 weeks after injury and 1.4-fold higher at the final visit, about 27 months after injury.
Study scope: Prospective nonrandomized serum-biomarker study with 16 cytokine-reference participants and no preinjury measurements.
Match: Human evidence connecting joint injury with a circulating inflammatory signal.

## 12. Acute systemic inflammation impairs endothelium-dependent dilatation in humans.
Hingorani et al. · 2000 · Human acute-inflammation experiment
https://pubmed.ncbi.nlm.nih.gov/10961963/
DOI: 10.1161/01.cir.102.9.994

Studied: 12 volunteers underwent brachial-dilation measurements; 6 underwent resistance-vessel testing
Design: Vaccine inflammatory stimulus in healthy people; vascular measurements before and after
Finding: Endothelium-dependent responses were impaired at eight hours. Resistance-vessel responses recovered by 32 hours.
Study scope: Acute vaccine-stimulus experiment, with conduit- and resistance-vessel physiology measured over hours.
Match: Experimental human evidence for the inflammation–vascular-function connection.

## 13. Acute systemic inflammation increases arterial stiffness and decreases wave reflections in healthy individuals.
Vlachopoulos et al. · 2005 · Human randomized acute-inflammation experiment
https://pubmed.ncbi.nlm.nih.gov/16186422/
DOI: 10.1161/CIRCULATIONAHA.105.535435

Studied: 100 healthy people across the study’s substudies
Design: Randomized, double-blind, sham-controlled experiments using an acute vaccine inflammatory stimulus
Finding: Aortic pulse-wave velocity increased by 0.43 m/s at eight hours.
Study scope: Healthy volunteers in short-term inflammatory-challenge experiments; arterial stiffness measured by aortic pulse-wave velocity.
Match: Experimental human evidence linking inflammatory activity and arterial stiffness.

## 14. Low-Level Laser Therapy Attenuates Arthrogenic Contracture Induced by Anterior Cruciate Ligament Reconstruction Surgery in Rats.
Kaneguchi et al. · 2022 · Animal experiment
https://pmc.ncbi.nlm.nih.gov/articles/PMC9470099/
DOI: 10.33549/physiolres.934796

Studied: 29 male rats after ACL reconstruction
Design: 830 nm laser, 150 mW, 120 seconds daily after ACL reconstruction; outcomes at one and two weeks.
Finding: Attenuated joint-capsule IL-1β expression at one week, alongside contracture and selected fibrosis outcomes.
Study scope: Local joint-capsule, motion and fibrosis endpoints after surgery in an animal model.
Match: ACL-specific preclinical evidence for local inflammatory and fibrotic modulation.

## 15. Low-level laser in the treatment of patients with hypothyroidism induced by chronic autoimmune thyroiditis: a randomized, placebo-controlled clinical trial.
Höfling et al. · 2013 · Human randomized placebo-controlled trial
https://pubmed.ncbi.nlm.nih.gov/22718472/
DOI: 10.1007/s10103-012-1129-9

Studied: 43 patients with chronic autoimmune thyroiditis: 23 active, 20 placebo
Design: Ten sessions; 830 nm laser, 50 mW, reported fluence 707 J/cm². Medication withdrawal and retitration were investigator-managed.
Finding: Mean required levothyroxine: 38.59 versus 106.88 µg/day at nine months (p<0.001). Anti-TPO p=0.043; echogenicity p<0.001.
Study scope: Disease-specific, clinician-monitored protocol; medication decisions remained part of specialist care.
Match: Positive thyroid-function study with randomized placebo comparison.

## 16. Efficacy of Combined Photobiomodulation Therapy with Supplements versus Supplements alone in Restoring Thyroid Gland Homeostasis in Hashimoto Thyroiditis: A Clinical Feasibility Parallel Trial with 6-Months Follow-Up.
Berisha-Muharremi et al. · 2023 · Human nonrandomized comparative study
https://pmc.ncbi.nlm.nih.gov/articles/PMC10455109/
DOI: 10.3390/jpm13081274

Studied: 74 women enrolled; 38 six-month completers: 18 PBM, 20 comparison
Design: 820 nm, 200 mW; eight points, 20 seconds and 32 J/cm² per point; six sessions across three weeks. Both groups received selenium 100 µg/day, vitamin D3 when indicated, clinician-managed levothyroxine and dietary advice.
Finding: Anti-TPO group median fell 83% from baseline to six months in PBM completers (within-group). The time-by-group analysis favored PBM for anti-TPO, TSH and FT4 (p<0.0001).
Study scope: Patient-preference allocation; endpoint numbers describe the 38 completers. The 83% is a within-group change in medians.
Match: Published combined PBM, vitamin D3 and selenium protocol.

## 17. Impact of Photobiomodulation on T3/T4 Ratio and Quality of Life in Hashimoto Thyroiditis.
Ercetin et al. · 2020 · Human nonrandomized comparative study
https://pubmed.ncbi.nlm.nih.gov/32186976/
DOI: 10.1089/photob.2019.4740

Studied: 350 patients: 210 PBM plus supplements; 140 supplements only
Design: 850 nm laser, 100 mW, eight ultrasound-mapped points, 20 seconds/point, 28.57 J/cm²/point. Six sessions across three days. Selenium, vitamin D and iron replacement as indicated; concurrent levothyroxine care.
Finding: At three months, weekly levothyroxine means changed 419.2→208.8 µg with PBM and 385.1→369.9 µg with supplements alone; final between-group p=0.03. T3/T4: 0.009→0.013 vs 0.008→0.008; between-group p=0.0001.
Study scope: Nonrandomized comparison with co-interventions and clinician-managed medication.
Match: Positive clinical thyroid study, distinct from the D3/selenium feasibility study.

Supporting primary text: https://www.researchgate.net/publication/340031429_Impact_of_Photobiomodulation_on_T3T4_Ratio_and_Quality_of_Life_in_Hashimoto_Thyroiditis

## 18. OLED catheters for inner-body phototherapy: A case of type 2 diabetes mellitus improved via duodenal photobiomodulation.
Sim et al. · 2023 · Diabetic rat experiment
https://pmc.ncbi.nlm.nih.gov/articles/PMC10854432/
DOI: 10.1126/sciadv.adh8619

Studied: Male diabetic Goto–Kakizaki rats; five treated and four sham animals
Design: Surgically inserted duodenal OLED catheter; one ten-minute treatment. Red spectrum 600–700 nm; 1.33 mW total radiant power and 798 mJ total energy.
Finding: F/B ratio decreased at weeks 1–2; Shannon diversity increased at week two (p<0.05). Beta diversity changed at week one (p<0.05) and two (p<0.01).
Study scope: Internal, catheter-delivered light in a diabetic model. F/B describes a context-specific compositional shift.
Match: Selected positive finding; source-specific model and endpoint.

## 19. Red light-emitting diode treatment improves tissue recovery in DSS-induced colitis in mice.
de Paula-Silva et al. · 2020 · Mouse colitis experiment
https://pubmed.ncbi.nlm.nih.gov/32957067/
DOI: 10.1016/j.jphotobiol.2020.112018

Studied: Male C57BL/6 mice with DSS-induced colitis; four groups, five per group
Design: Red LED, 90 seconds daily on days 6–9 after DSS withdrawal, applied to ventral sites and beside the external anus.
Finding: Better claudin-1 organization; increased epithelial proliferation and Annexin A1; lower IL-1β and IL-6 elevations, apoptosis, ulcers and inflammatory infiltration.
Study scope: Intestinal histology, tight-junction protein organization and inflammatory markers during short-term experimental colitis recovery.
Match: Selected positive finding; source-specific model and endpoint.

## 20. Light-emitting diodes at 940 nm attenuate colitis-induced inflammatory process in mice.
Belém et al. · 2016 · Mouse colitis experiment
https://doi.org/10.1016/j.jphotobiol.2016.07.008
DOI: 10.1016/j.jphotobiol.2016.07.008

Studied: 40 male Swiss mice across five randomized groups; eight per group
Design: One 940 nm LED exposure: four minutes, 4.05 J/cm², 270 mW total, 64.8 J; 16 cm² array 1 cm above the dorsal abdomen.
Finding: At 18 hours after induction, gross-lesion score was 2 with LED versus 9.5 untreated. MPO activity was approximately 53% lower; IL-1β, TNF-α and IL-6 were reduced (p<0.05).
Study scope: Acute acetic-acid colitis. Numerical lesion and MPO results are reported in the author’s thesis manuscript containing this study.
Match: Selected positive finding; source-specific model and endpoint.

Supporting primary text: https://repositorio.uel.br/srv-c0003-s01/api/core/bitstreams/792cdb29-3eb5-4e0a-bc84-766039ad9580/content

## 21. Photobiomodulation Strengthens Muscles via Its Dual Functions in Gut Microbiota.
Upadhyay et al. · 2025 · Mouse experiments + fecal cultures
https://pmc.ncbi.nlm.nih.gov/articles/PMC12697884/
DOI: 10.1002/advs.202511582

Studied: BALB/c mice in exercise and antibiotic/lactic-acidosis models; complementary anaerobic fecal cultures
Design: 980 nm abdominal irradiation, alone or with hindlimbs; ten sessions across 30 days in the exercise experiment. Authors targeted 0.1 J/cm² transmitted tissue dose.
Finding: Caecal crypt architecture improved in the abdominal-treatment exercise group (p=0.0004). Under acidosis, crypt length, goblet-cell counts and epithelial proliferation increased; seven measured microbial phyla were preserved.
Study scope: Histology, proliferation and microbiome endpoints in mouse stress models; stated tissue dose accounts for transmission through skin.
Match: Selected positive finding; source-specific model and endpoint.

## 22. Microcirculatory Response to Photobiomodulation—Why Some Respond and Others Do Not: A Randomized Controlled Study.
Gavish et al. · 2020 · Human randomized wavelength comparison
https://pubmed.ncbi.nlm.nih.gov/32064652/
DOI: 10.1002/lsm.23225

Studied: 20 healthy nonsmokers randomized to red or near-infrared light; mean age 30±8 years
Design: 830 nm LED, 55 mW/cm², five minutes over the wrist; 16.5 J/cm². Palm flow monitored during exposure and for 20 minutes afterward.
Finding: Near-infrared flow increased 27% during exposure (p=0.049) and 54% during the 20-minute follow-up (p=0.004), relative to baseline.
Study scope: Acute human physiological measurement; response depended on wavelength and initial skin temperature.
Match: Selected positive finding; source-specific model and endpoint.

## 23. Immediate Effects of Monochromatic Infrared Energy on Microcirculation in Healthy Subjects.
Mak & Cheing · 2012 · Human randomized controlled study
https://journals.sagepub.com/doi/10.1089/pho.2011.3012
DOI: 10.1089/pho.2011.3012

Studied: 30 healthy volunteers randomized to active LED, sham LED or warm packs
Design: 890 nm LED array in skin contact; 60 mW/cm² for 30 minutes, 108 J/cm² over 22.5 cm².
Finding: Both capillary blood-cell velocity and skin-flow increases were greater with active treatment than either comparator (all p<0.05).
Study scope: Immediate pre/post microcirculation measurements in healthy feet, with sham and heat comparisons.
Match: Selected positive finding; source-specific model and endpoint.

## 24. In Vivo Characterization of a Red Light-Activated Vasodilation: A Photobiomodulation Study.
Keszler et al. · 2022 · Mouse physiology experiment
https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2022.880158/full
DOI: 10.3389/fphys.2022.880158

Studied: C57BL/6 mice; acute perfusion experiments with separate ischemia experiments
Design: 670 nm LED, 50 mW/cm² for ten minutes; 30 J/cm². Whole-body exposure for the reported acute perfusion result.
Finding: Flow increased from 453±45 to 1,097±75 Doppler intensity units, approximately 2.4× (p=0.0013). Plasma NO-precursor concentration increased from 19.7±3.0 to 29.9±3.9 nM (p=0.0469).
Study scope: Acute mouse perfusion and biochemical measurements. Values are means±SD; the circulating measurement concerns NO-related precursor species.
Match: Selected positive finding; source-specific model and endpoint.