Red Light Therapy for Kids: Benefits & Safety
- Jan 10
- 7 min read
Updated: Aug 17
You've been up half the night again with a kid who is sick for the third time this winter. You've been handed antibiotics, then a shrug, then some version of kids just get sick. So at some point you started searching, and red light therapy came up, and it sounded gentle and safe and maybe like the thing nobody had bothered to tell you about.
I'm going to be straight with you, because you have been sold enough already. Red light therapy is real. It has been studied. It does some things well. It does not do most of what the internet claims it does. Healthy skepticism is welcome here, and that goes for skepticism about this too.
Here is what the research actually supports, what it doesn't, and where I would put it in the order of things for a child.
What do parents ask me most about this?
Short answers first. The full reasoning is below.
Does red light therapy actually work?
It is real and it has been studied. The strongest evidence in children is for painful mouth sores during chemotherapy, and there is reasonable work on skin and wound healing. That is a narrower claim than what you will see online.
Will it boost my child's immune system or mean fewer sick days?
I cannot tell you that. That claim shows up everywhere online and the evidence does not support it. No light therapy treats or cures a condition on its own, and anyone saying otherwise is your signal to slow down.
How is it supposed to work?
Light in certain wavelengths is absorbed by mitochondria, the tiny engines that turn food and oxygen into energy. It is a biologically grounded idea that researchers are still working out.
Where does it sit in your order of operations?
Last. Before I would spend a minute on a light panel I want the Foundational Five in place. That is not dismissiveness, it is arithmetic. A panel will not out-perform sleep or a blocked airway.
We already own a device. Should we stop?
Not necessarily. If a family is already using one, I would much rather help them use it sensibly and keep expectations honest than pretend it does not exist.
What red light therapy actually is
Red light therapy, called photobiomodulation in the research, means shining low levels of red or near-infrared light onto the skin. It is not UV light. It doesn't burn and it doesn't tan. Most sessions are short and painless, and most kids find them boring, which is honestly a good sign.
The mechanism, in plain language
Inside almost every cell in the body are mitochondria. Think of them as tiny engines that turn food and oxygen into usable energy. The leading explanation for red light therapy is that one particular enzyme inside those engines absorbs red and near-infrared light, and that absorption nudges how the cell makes energy and how it signals to its neighbours.
That is the proposed mechanism, and researchers are still working out the details. It's a reasonable, biologically grounded idea with real laboratory support behind it. It is not settled science, and I'd rather tell you that than dress it up.
Where the evidence is genuinely strong
There is one place where photobiomodulation has good evidence in children specifically, and it is worth knowing about because it shows the therapy can do real work when the target is right.
Children going through chemotherapy often develop painful mouth sores, called oral mucositis. It hurts, it makes eating hard, and it can delay treatment. Systematic reviews of pediatric oncology patients have found that photobiomodulation helps prevent and reduce these sores. That's why you'll find hospitals with trained staff delivering it on a schedule, with specific devices and specific settings.
There is also a reasonable body of work on skin and wound healing, and laboratory and clinical work showing anti-inflammatory effects at the tissue level.
Where the evidence is thin, and what I won't tell you
I can't tell you that red light therapy boosts your child's immune system or means fewer sick days. That claim shows up everywhere online. The studies that exist don't support it. Showing that a light changes inflammatory signals in a tissue sample is a very different statement from showing that a panel in your living room keeps a four-year-old from catching everything at preschool.
Brain photobiomodulation, meaning light aimed at the head for mood, focus or recovery, is an active research area. Most of that work is early, small, and done in adults. I'd call it interesting. I would not call it established, and I wouldn't build a child's plan on it.
And no light therapy treats or cures a condition on its own. If someone is telling you it does, that is your signal to slow down.
What I'd want you to know about safety
It's non-invasive and generally well tolerated in the studies that report side effects, which is part of why it gets studied so widely.
Eyes need protecting. Don't let a child look into the light source. Use whatever eye protection comes with the device, every time.
Home devices vary enormously. Wavelength, power output and build quality are all over the map, and marketing claims are not held to the same standard as a hospital device. Two panels that look identical can deliver very different doses.
More is not better. The doses used in research are specific, and going longer or closer doesn't scale the benefit. Follow the instructions rather than your instinct.
Talk to your pediatrician first, especially if your child has a skin condition, a light-sensitive condition, or takes any medication that increases light sensitivity.
Where this sits in my order of operations, which is last
Before I would spend a minute on a light panel, I want the Foundational Five in place: sleep, airway, nutrition, hydration and movement. If you don't have the Foundational Five in place first and foremost, none of the rest of it even matters.
That isn't me being dismissive. It's arithmetic. A red light panel will not out-perform sleep. It will not out-perform an airway that's finally open at night, or protein at breakfast, or a kid who finally drinks enough water. Those five are free or close to it, and in most children they move far more than any device.
If a family is already using a light device, or is asking me about one, I'd much rather help them use it sensibly and keep expectations honest than pretend the question isn't being asked. It sits in the same category as a warm bath before bed: a supportive tool, not a treatment plan.
What I'd look at first for the child who is always sick
If frequent illness is the real reason you found this page, here is where I'd actually start.
Sleep and airway. Mouth breathing, snoring, sweating through pajamas, teeth grinding. A body that never reaches deep rest doesn't repair or fight infection well. Snoring with gasping or pauses in breathing needs a call to your pediatrician this week.
The gut. A large share of the immune system sits in and around the gut. Constipation, belly pain, loose stools, eczema and picky eating that keeps narrowing all belong in this conversation.
Food. Protein at breakfast, real fats, fewer artificial dyes and hidden sugars, less highly processed food. Food is medicine, and it does the heavy lifting.
Water and movement. Both are unglamorous and both matter more than parents expect.
Then, if it's still not adding up, testing. Basic labs first, including ferritin and iron. Stool and gut microbiome testing when the picture is gut-heavy. Organic acids testing when the picture calls for it. Testing, not guessing, but after the foundations, not instead of them.
Building a plan around your child
Every child is different, so every plan is different. That's the whole idea behind my Missing Piece Method: a guided program built around the why behind the symptoms rather than a list handed to everybody.
I work in phases. Foundations first, then whatever the testing actually showed, one layer at a time so you can tell what helped. A lot of functional medicine practices get a bad rap because they layer in twenty or thirty supplements at once for a kid. I don't do that. Food does the heavy lifting, and everything else is chosen for your child, for as long as they need it and no longer.
I also work in conjunction with therapies, therapists and specialists, not as a replacement. Your child's pediatrician stays their pediatrician.
If you want to talk it through
We start with a Happy Kid consult. It's a free conversation where I hear the story and we both decide whether I'm the right fit for your family. I'll tell you honestly whether I can help, and if someone else is a better fit for your child, I'll say so.
Bring your questions about red light therapy, or about anything else you've read at 1am. I turn to the parent as the true expert of their child, and I'll never tell you this is just how it is. Because more often than not, that's not true.
Written by Dr. Amy Patton, Founder Happy Kid Functional Medicine
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About the author
This article was written by Dr. Amy Patton, DNP, APRN, CPNP-PC, FMACP, a board-certified pediatric nurse practitioner and functional medicine provider serving Omaha-area families through Happy Kid Functional Medicine. Dr. Patton specializes in root-cause pediatric care for children's gut health, sleep, behavior, nutrition, immune patterns, and whole-child wellness. She sees patients in person in Omaha and by telehealth across Arizona, Colorado, Iowa, Nebraska, Tennessee, and Virginia.
References
de Freitas LF, Hamblin MR. Proposed mechanisms of photobiomodulation or low-level light therapy. IEEE Journal of Selected Topics in Quantum Electronics. 2016;22(3):7000417.
Hamblin MR. Mechanisms and applications of the anti-inflammatory effects of photobiomodulation. AIMS Biophysics. 2017;4(3):337-361.
Avci P, Gupta A, Sadasivam M, et al. Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring. Seminars in Cutaneous Medicine and Surgery. 2013;32(1):41-52.
Marques MT, Arede LT, Mendes JJ, et al. Photobiomodulation as a preventive strategy for oral mucositis in pediatric oncology: a systematic review and meta-analysis. Journal of Dentistry. 2025;162:106074.
Calarga CC, Cotomacio CC, Simoes A, et al. Photobiomodulation for oral mucositis management in pediatric patients: a systematic review. Lasers in Medical Science. 2024;39(1):272.
Salehpour F, Mahmoudi J, Kamari F, et al. Brain photobiomodulation therapy: a narrative review. Molecular Neurobiology. 2018;55(8):6601-6636.
Medical disclaimer: This article is educational and is not medical advice. It does not diagnose, treat, or replace individualized care from your child's pediatrician or licensed medical provider. Supplement types, doses, and combinations should be selected with a qualified clinician who knows your child's full history — never start a new supplement based on a blog post alone. Always consult your pediatrician before making changes to your child's routine, and seek prompt medical care for snoring with gasping or pauses in breathing during sleep, or for any severe, sudden, or concerning symptom.
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