Research article
Understanding wavelengths and research
A plain-language guide to reading red and near-infrared light research with appropriate care.
Read the articleHyala research library
A clearer way to read the light.
The studies linked here are external research on LED technology and photobiomodulation, or the effect of light on the body, skin and more.
Research brief
First and last light: a warmer sunlight spectrum
Why the low sun can appear warmer: a longer journey through the atmosphere reduces short-wavelength light more strongly before it reaches us.
Read the briefResearch brief
Red and near-infrared light: mitochondrial research
What photobiomodulation studies investigate about red and near-infrared light, mitochondria and cellular energy, with important limits on interpretation.
Read the briefClinical study
Skin Rejuvenation & Collagen Support
Lee et al., 2007. Journal of Photochemistry and Photobiology B: Biology.
Clinical study
Photoaging Skin Study
Goldberg et al., 2006. Journal of Drugs in Dermatology.
Clinical study
Acne & Breakout Reduction
Papageorgiou et al., 2000. British Journal of Dermatology.
Clinical study
Mechanism & Safety
Avci et al., 2013. Seminars in Cutaneous Medicine and Surgery.
Clinical study
Under-Eye Rejuvenation
Springer, 2024. Study on an under-eye LED device.
Clinical study
Multiwavelength Photobiomodulation in Dry AMD
Boyer et al., 2024. Retina. Randomized, controlled trial; 590, 660 and 850 nm light. PMID: 37972955.
Clinical study
Transcranial Photobiomodulation in Adults Over 50
de Oliveira et al., 2024. Journal of Photochemistry and Photobiology B. Randomized, double-blind, placebo-controlled trial. PMID: 39423445.
Clinical study
Red and Infrared LED Photobiomodulation
Borges et al., 2024. Lasers in Medical Science. Controlled, randomized clinical trial of red and infrared LED photobiomodulation. PMID: 39382587.
Clinical study
Daily 650 nm Low-Level Red Light
Cao et al., 2024. JAMA Ophthalmology. Single-masked randomized clinical trial. PMID: 38662345.