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

Does red-light therapy reduce pain?

Promising but highly protocol-dependent

Photobiomodulation has been tested for pain across several conditions, with some trials and reviews reporting benefit. Results vary by diagnosis, wavelength, energy dose, treatment site, schedule and comparator. A positive result for one condition and protocol does not establish that any red-light device relieves pain generally.

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Evidence profile

What the evidence can—and cannot—support

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

Dose reporting and condition-specific effects make broad conclusions unreliable.

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Research Receipt

An auditable count, not “studies show”

Claim checkedPhotobiomodulation reduces pain.
Dataset edition2026-10-29
30matched publications
18randomized trials
8reviews / meta-analyses
13registered trials
2active trials
Reproduce this receipt

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

Outcome expression: "pain" OR "analges" OR "soreness"

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 reduce pain?” HRD Claim Ledger. Dataset 2026-10-29. Accessed 2026-10-29.

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