Health Research DatabaseClaim-to-evidence tracking
HRD Claim Ledger · Living evidence brief

Does red-light therapy help knee pain?

Promising but protocol-dependent

Some randomized trials and reviews report pain or function improvements from photobiomodulation in knee conditions, particularly osteoarthritis, while other results are less certain. Wavelength, dose, treatment site, session schedule and comparator vary substantially, so the findings do not validate every consumer red-light device or protocol.

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01
Evidence profile

What the evidence can—and cannot—support

Human evidenceModerate
Randomized evidenceModerate
ConsistencyMixed
ReplicationMultiple groups
DirectnessModerate
Long-term outcomesLimited
Important uncertainty

Device parameters and co-interventions make broad generalization difficult.

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Research Receipt

An auditable count, not “studies show”

Claim checkedPhotobiomodulation reduces knee pain.
Dataset edition2026-09-18
5matched publications
2randomized trials
1reviews / meta-analyses
3registered trials
1active trials
Reproduce this receipt

Included: Records in the Photobiomodulation / red light topic whose high-signal metadata contains at least one outcome term below.

Outcome expression: "knee" OR "osteoarthritis" OR "gonarthrosis"

Excluded: Records outside the intervention topic, animal-only records rejected by the source query, and records without an outcome-term match. This is a reproducible index, not a systematic review.

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Matched publications

Why these records count

Each record matched the intervention topic and at least one claim-specific outcome term. Open a record for source metadata and inclusion provenance.

Trial Radar

Evidence that may change the answer

Registration is not a result. Status and dates come from ClinicalTrials.gov.

Cite this page

Make the evidence trail portable.

Health Research Database. “Does red-light therapy help knee pain?” HRD Claim Ledger. Dataset 2026-09-18. Accessed 2026-09-18.

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