Fine lines, rough texture, a tired-looking complexion — skin is one of the most common reasons people look into red light. But does a controlled trial back up the idea? Here is what one well-known study actually measured, and what it can and cannot tell us.
Study at a glance
- Authors: Alexander Wunsch and Karsten Matuschka
- Journal / year: Photomedicine and Laser Surgery, 2014 (32(2):93–100)
- Design: Randomized, controlled trial with 136 volunteers
- Light used: Two polychromatic light sources, one at 611–650 nm (red) and one at 570–850 nm (red plus near-infrared), compared with untreated controls
- Treatment length: 30 sessions, with measurements at baseline and after the series
- Outcomes: Blinded clinical photo assessment, ultrasound-measured intradermal collagen density, profilometric skin roughness, and participant-reported satisfaction
What the research shows
According to the published abstract, the treated groups showed significant improvements compared with controls in several measures: complexion and skin feeling, lower skin roughness on profilometry, and higher collagen density on ultrasound. Blinded evaluation of photographs also favored the treated groups.
The authors also reported that the broader-spectrum light (570–850 nm) showed no clear advantage over the red-only spectrum, and they concluded that both light sources were effective and safe compared with controls.
It is worth being honest about the limits. This is one trial, on healthy volunteers, using specific professional light sources. It does not tell us how a different device, distance or schedule would perform, and it does not show that red light helps any medical skin condition. Results from this kind of cosmetic study should be read as encouraging, not definitive.
Why it may work
Researchers in photobiomodulation propose that red and near-infrared wavelengths are absorbed by components of the cell's energy machinery, such as cytochrome c oxidase in the mitochondria. In cell studies this absorption has been linked to changes in cellular energy production and signalling, which in skin cells may relate to collagen-producing fibroblast activity. This is a proposed mechanism, and how strongly it translates to everyday results in people is still being studied.
Real-world use
Most people who try red light for skin do so as part of an evening or morning routine: a few minutes in front of a panel, on clean, dry skin, repeated consistently over weeks. The trial itself involved a series of 30 sessions, which is a reminder that any change, if it occurs, is likely gradual rather than overnight. Sunscreen, sleep, nutrition and not smoking remain the well-established foundations of skin health.
Where the Gudslip panel fits
The Gudslip® Red & Infrared Light Therapy Panel is a compact home device built around 660 nm red light plus infrared, wavelengths in the same general red/near-infrared family studied in this field. We want to be clear: the trial above used different, professional light sources, so we are not claiming the panel will reproduce its results. We offer it as a convenient way to build a consistent red-light habit if you are curious about the approach.
How to use it
- Start with clean, dry skin free of creams, makeup or sunscreen.
- Follow the distance and session time in the device instructions.
- Protect your eyes as directed; do not stare into the light.
- Be consistent for several weeks and track how your skin feels and looks, for example with photos in the same lighting.
- Stop and seek advice if you notice irritation.
FAQ
Does red light therapy remove wrinkles?
The study reported improvements in roughness and collagen density measures, but that is not the same as removing wrinkles. Individual results vary.
How long until I might notice something?
The trial used 30 sessions before re-measuring, so patience and consistency matter. There is no guaranteed timeline.
Is red or infrared light better?
In this trial, the red-only spectrum performed comparably to the broader red plus near-infrared spectrum.
Is it suitable for everyone?
Not necessarily. If you are pregnant, photosensitive, taking photosensitizing medication or have a skin condition, ask a healthcare professional first.
The bottom line
A randomized controlled trial of 136 volunteers reported better skin complexion, lower roughness and higher collagen density measures after a series of red and near-infrared light sessions versus controls. That makes skin one of the more promising everyday areas of research, though one study does not settle the question. Red light is best viewed as a possible addition to, not a replacement for, a solid skincare routine.
Disclaimer: This article is for general wellness information only and is not medical advice. Gudslip® products are wellness products and are not intended to diagnose, treat, cure or prevent any disease. Consult a healthcare professional before starting any new routine, especially if you have a medical condition.
References
- Wunsch A, Matuschka K. A controlled trial to determine the efficacy of red and near-infrared light treatment in patient satisfaction, reduction of fine lines, wrinkles, skin roughness, and intradermal collagen density increase. Photomed Laser Surg. 2014;32(2):93–100. doi:10.1089/pho.2013.3616. PubMed