The science behind the light.
Oralumi uses three wavelengths — 660nm red, 830nm near-infrared and 460nm blue. Each one was chosen because of what researchers have found it does at the gumline.
Here is that work, with links to every paper.
Light your gum tissue absorbs
Cells contain molecules that absorb red and near-infrared light. When they do, the cell’s energy production shifts — a process researchers call photobiomodulation. Red at 660nm works closest to the surface, where gum tissue meets the tooth. Near-infrared at 830nm reaches deeper into the tissue.
In dentistry this has been studied for years, and it is the reason light therapy has a place in periodontal care at all.
What the research associates it with
The research
Adjunctive photobiomodulation to basic periodontal therapy
Lasers in Medical Science, 2024 · Systematic review and meta-analysis
Pooled randomised controlled trials on adding low-power light to periodontal therapy, and compared the different ways of applying it. The strongest form of evidence on this page.
Read itAdjunct 660nm LED irradiation during non-surgical periodontal therapy
Journal of the Formosan Medical Association · Randomised controlled trial
A controlled trial using an LED at 660nm — the same red wavelength in our brush — during periodontal treatment, measuring the clinical response at the gumline.
Read itLaser phototherapy at 660nm for reducing gingival inflammation
National Library of Medicine (PMC) · Clinical study
Red light at 660nm applied to inflamed gum tissue. The authors concluded it was beneficial for reducing gingival inflammation.
Read itPhotobiomodulation in diabetes with chronic periodontitis
PubMed, 2025 · Systematic review and meta-analysis
Examined light therapy in people whose gum disease is harder to treat because of type 2 diabetes — one of the most difficult groups to show improvement in.
Read itLow-level laser therapy for gingival inflammation
Healthcare, 2025 · Review of in vitro, animal and clinical studies
A wide overview of the evidence on red light and gum inflammation, drawing together laboratory, animal and clinical work in one place.
Read itMechanisms and mitochondrial redox signalling in photobiomodulation
Photochemistry and Photobiology, 2018 · Michael R. Hamblin
The standard reference on how red and near-infrared light act on cells, written by the most-cited researcher in the field. If you want to understand the mechanism rather than the outcome, start here.
Read itLight that bacteria absorb
A completely different mechanism. Certain bacteria produce pigments — porphyrins — that absorb blue light. When they do, reactive oxygen is generated inside the cell and the bacterium is damaged from within. No antibiotic, no dye, nothing added.
Porphyromonas gingivalis, one of the organisms most closely associated with gum disease, is among the species this works on. So are several of the bacteria that produce the sulfur compounds behind bad breath.
What the research associates it with
The research
Efficacy of an LED toothbrush on a Porphyromonas gingivalis biofilm
National Library of Medicine (PMC), 2018 · In vitro study
The closest published work to our product: an LED toothbrush tested directly against a biofilm of the bacterium most associated with gum disease.
Read itAntimicrobial effect of blue light using Porphyromonas gingivalis pigment
Scientific Reports, 2017
Identified why this works at all: the bacterium’s own pigment absorbs blue light, which is what makes it vulnerable without anything being added.
Read itThe effect of blue light on periodontal biofilm growth
Lasers in Medical Science · In vitro study
Tested blue light against multi-species periodontal biofilm — the mixed bacterial community that actually forms along a gumline, rather than one isolated species.
Read itAntimicrobial blue light: an emerging alternative to antibiotics
Photomedicine and Laser Surgery, 2013 · Review
A broad overview of blue light’s antibacterial effect across many species, and of why resistance to it has not emerged the way it has with antibiotics.
Read itWhy they show up together
Bad breath is, chemically, volatile sulfur compounds — produced by bacteria breaking down proteins in the mouth. Many of those bacteria live in exactly the pockets an inflamed gumline creates for them.
That is why bleeding gums and bad breath so often arrive in the same mouth, and why working on one tends to mean working on the other.
The research
Volatile sulfur compounds in patients with gingivitis and periodontitis
National Library of Medicine (PMC), 2023 · Clinical study
Measured the compounds responsible for bad breath in people with gum inflammation, establishing the link between the state of the gumline and the smell of the mouth.
Read itLight therapy on the tongue dorsum for halitosis
National Library of Medicine (PMC), 2024 · Randomised clinical trial
Treated the back of the tongue with light and measured both the reduction in halitosis and how long the effect lasted.
Read itTwo minutes, twice a day.
All three wavelengths run for the full brushing cycle, alongside 40,000 sonic strokes a minute — in the same two minutes you already spend.
The studies linked above are the work of their authors and publishers and concern red, near-infrared and blue light in general. Oralumi is a toothbrush, not a medical device, and is not intended to diagnose, treat, cure or prevent any disease. It is not a substitute for professional dental care.