Low-level light therapy: a reasonable evidence base, with gaps
Short answer
This review of low-level light therapy found a reasonable body of trial evidence that low-energy red and near-infrared light is safe and effective for skin rejuvenation and acne. It also flags small studies, methodological flaws and industry funding, and says it is unclear whether LED sources work as well as the lasers used in most higher-quality studies.
- Study
- Glass GE. Aesthet Surg J. 2021;41(6):723-738.
- Design
- Review
- People
- Review of clinical literature
- Topic
- Skin rejuvenation
Why it matters
It covers both LED masks and low-level lasers such as LYMA, and directly raises the question of whether LEDs and lasers are equivalent.
What they did
- Reviewed clinical studies of low-level light therapy for wrinkles, pigmentation, acne, wound healing, body contouring and hair loss.
- Discussed the regulatory framework for consumer devices.
What they found
- A reasonable body of trial evidence supports red/near-infrared light for skin rejuvenation and acne.
- Evidence quality is limited by flaws, small cohorts and industry funding.
- It remains unclear whether LED sources match the laser-based systems used in most higher-quality studies.
What it cannot tell you
- Narrative review, not a meta-analysis.
- The author is LYMA’s scientific lead, according to LYMA’s website; readers should weigh this.
- Calls for independent, adequately powered trials.
Takeaway
Red and near-infrared light has real but modest evidence. Whether an LED mask equals a low-level laser has not been settled.
Matching devices
Devices whose published technology match this study: CurrentBody Series 3, Dr. Dennis Gross FaceWare Pro, Dr. Renú SpectraLift, LYMA Laser, LYMA Laser PRO, Omnilux Contour and Shark CryoGlow. None of them was the device tested unless the study names it.
Not medical advice. Summary based on the published abstract; read the full paper for detail.