Red light therapy has become a major health fad in the past few years - with good reason.
There's an ever-growing body of scientific evidence that it works for helping medical conditions from skin problems to high blood sugar to aging itself.
However, you - like many others - may be hesitating.
It is an investment. Red light devices range in price from under $100 to $1,000's.
The barrier to entry to manufacture LED lights is low. Therefore, there's a huge number of models to choose from, and it's not easy for a consumer without the necessary specialized equipment to test and verify the wavelength(s) the device is giving off. Red light displays are obvious, but the near infrared and infrared wavelengths are invisible to the human eye, so with those ranges you can't tell whether the device is even working.
Plus, the larger devices can take up a lot of room in your home, and not everybody has that. If you can afford and have space for your own at-home red light sauna, great. Some people have to take size into account.
Besides, they require on-going electricity that not everyone can afford.
And there're no research-based, clear-cut and specific, do-it-yourself instructions and procedures.
So, trying red light therapy is much more complicated than simply buying a bottle of pills.
The good news is, there's an ancient red light therapy "device" that is free, though not always available.
There are also low-cost ways to use red light in your home to help maintain good health.
A recent - July 2025 - study shows red light affects our bodies even more powerfully - and generally - than we'd realized, and this can help simplify your buying decision (somewhat).
While also making red light exposure an even more important healthy practice.
But It's ONLY Light . . .
When you first hear of red light therapy, it sounds like a scam.
Simple red light makes you look younger . . . relieves pain . . . delays aging . . .
Yeah, right - tell me another one.
But this stems from a misunderstanding of the nature of light itself - and this comes from our limited perception of it.
We can't touch it or (usually) feel it, but light is a fundamental part of this material universe - and has properties that do very much affect our physical bodies - for both good and ill.
The Physics of Light
As one online article puts it: "Light is nature's way of transferring energy through space."
And, actually, what we call light is just one kind of electromagnetic radiation. The full electromagnetic spectrum is quite wide, and includes not only visible and invisible light, but also gamma rays, X-rays and radio waves.
Electromagnetic radiation is energy in wave form. Like ocean waves, there is a certain distance between the peaks of two adjoining waves. The closer the peaks, the higher the frequency.
The frequency determines the nature of the radiation.
What we call visible or optical light ranges from around 400 to 700 nanometers. Those frequencies contain the colors of the rainbow.
Yet, there're also spectrums or frequencies of light from 10 to 400nm - ultraviolet. After 700nm, you get near-infrared and infrared.
Our eyes are not built to detect these any more than we can see radio waves, but they're there.
Sunlight is the most broad spectrum form of light, ranging from 300 to 3000nm.
That's critical. Sunlight is obviously the form of light our eyes evolved to function with. And it contains BOTH the ultraviolet light which can cause sunburn and, over time, skin cancer - and all spectrums of red light.
I'm using the term "red light" generally to refer to all forms of it - ranging from visible red to near-infrared (NIR) and infrared (IR). From around 640nm to over 900nm.
You've Heard of the Risks of Blue Light
The short end of the spectrum has different effects on us than the longer red.
It's ultraviolet light that damages your skin, causing it to turn brown, then to burn, and - over time - causes skin cancer.
Blue light is why many experts advise us to stop looking at screens at least half an hour before bedtime. You can get software to dim the intensity of them after sunset.
More seriously, we have learned blue light also has more negative effects. It can kill photoreceptors in the retinas of mice.
It also reduces the effectiveness of mitochondria.
Mitochondria are in every cell of your body except red blood cells. The highest concentration of mitochondria is in the cells of your retina. It takes a lot of energy to capture the light falling on our retinas and then to transmit those images to the brain along your optic nerve. Your retinas have the highest metabolic rate of your body.
Often described as the "powerhouses" of our cells, it's our mitochondria that combine oxygen and glucose to form the ATP our bodies use as energy. If all your mitochondria turned off at once, you'd drop dead in an instant. That can't happen, fortunately - but age does degrade our mitochondria, and that's a major cause of chronic disease - often called the Mitochondrial Theory of Aging.
Blue light reduces their energy output. That makes cells less effective. That makes organs less functional. That makes you tired and - at best - sets you up for chronic disease.
In short, too much blue light can give you the blues.
The Effects of Red Light on Our Mitochondria
As you know, 70% of our bodies are water. That includes the viscous nanowater surrounding the mitochondria in our cells.
Water preferentially absorbs red light. That's why the ocean appears blue on sunny days. Its water absorbs the sun's red wavelengths, while reflecting the sun's blue wavelengths.
Therefore, red light boosts our mitochondria, so they make more energy.
I'm no medical researcher, but I can't think of any more direct way of helping your body to live with more energy.
All the oxygen in the world wouldn't do you any good if your mitochondria didn't function. Same with the blood glucose from our food.
In effect, our mitochondria regulate the pace of living - and aging.
Fading mitochondria don't give you a heart attack, but they weaken your heart so it's more vulnerable to a coronary artery blockage. They don't cause cancer, but they can weaken your body's immune response, allowing a new tumor to grow.
Mitochondria go downhill for many reasons, including age, lack of sleep, not enough exercise and poor diet. Every unhealthy lifestyle habit you can think of weakens mitochondria.
And, as we are learning more about every day, blue light also disrupts mitochondria.
Mighty mitochondria don't directly repair injuries or remove arterial plaque, but they do provide the energy for your entire body to protect itself in all possible ways. That includes repair, healing and rejuvenation.
That's where red light comes in.
The more research we carry out, the more we learn red light - and even higher frequencies - benefits our health.
That includes reducing the amount of programmed cell death (apoptosis). When our cells get old and gray, our bodies tell them to kill themselves, to make room for new, young cells. This is natural and normal. But keeping cells younger and healthier - which red light does - is even better.
So, it's a good thing 50% of the photons in sunlight are on the infrared spectrum.
How Red Light Benefits Mitochondria
In effect, your mitochondria are like "engines" producing energy through their biochemical activity.
The longer wavelengths of red light+ boost the flow of electrons along the electron transport system. The mechanism gets detailed, and science still doesn't understand every step of the process, but the result is beyond question.
All the red light frequencies boost the production of ATP by increasing the efficiency of the electron transport system.
Red light also boosts nitric oxide (NO), which also increases ATP production.
The increased and more efficient production of energy also reduces how many free radicals the mitochondria release when they make ATP.
All this increased energy makes cells function better. That makes your organs function better. That makes you healthier, and feeling younger and more energetic.
Red Light Therapy Isn't New
What's the best red light therapy device?
According to Dr. Roger Seheult of MedCram, it's the one in the middle of our solar system - the sun.
Sunlight is the most broad spectrum light available - and of course includes a wide range of red wavelengths.
Another source of red light is almost as old as humanity - fire.
Prior to Thomas Edison's invention of the light bulb, the ONLY sources of light people had was the sun during the day and fire at night.
Edison invented the incandescent bulb, which also generates a fair amount of red light.
Therefore, humanity is adapted to living with light sources that include a lot of red wavelengths.
Although modern medicine is not oriented around this, in ancient times thousands of years ago, healers helped people by setting them outside, in the sunlight. It was called "hilotherapy" after the Greek word for sun, 'elios.'
They knew what we all know: hanging out in the sun makes you feel good.
But I Thought Sunlight was Bad, and Would Give Me Skin Cancer
Short answer: it absolutely can.
So, how then is sunlight healthy?
As the most broad spectrum form of light, sunlight comes with it all. That includes ultraviolet radiation which tans your skin and, if you stay in direct sunlight too long, burns you.
And sunburn is not only painful, but in the long run it can cause skin cancer.
Apply the Goldilocks Principle: get just enough sunlight to enjoy the health benefits, but not enough to experience the health problems.
If you get burned, you got too much sun.
Pay close attention to what you're doing. If you're going to be outside in direct sunlight for a significant amount of time, put on sunscreen and sunglasses. Wear shirts and floppy hats and stay in the shade. Take all the precautions skin doctors tell us to.
This also means: avoid sun "bathing" and tanning beds. If you want to hang out for a while at the beach or swimming pool, stay under a large umbrella.
Remain aware of your skin, including its color. The lighter the shade of human skin, the more easily it burns in the sun. That means, the less time you should remain in sunlight without sunblock or other protection.
The darker your skin, the better it is at resisting the negative effects of ultraviolet radiation. That means it's safer for you to remain in the sun without sunblock or other protection than for somebody with a lighter shade of skin. However, your protection is not unlimited, so don't try to push it.
Above all else, everybody - avoid sunburns.
Red Light the Natural Way
The good news is, it's easy to get red light from the sun while still protecting your skin from ultraviolet radiation.
If you go outside early in the morning or late in the evening, the light is slanted so you get much more red light than UV radiation. If possible, avoid sunlight when the sun is directly overhead. That's 10:00 AM to 2:00 PM - or 11:00 AM to 3:00 PM if your location has Daylight Savings Time (which doesn't affect where in the sky the sun is shining from.)
Also, the layers of cloth in your t-shirts or other clothing block UV radiation, but NOT red light. So wear comfortable clothes - and that floppy hat to protect your head.
When the sunlight is strong and direct, wear sunglasses to block the blue.
Maybe Sunlight's Health Benefit are Just Due to Vitamin D
The history of sunlight exposure for red light benefits necessarily overlaps with another way sunlight positively affects us: Vitamin D.
We make Vitamin D from the ultraviolet radiation in sunlight hitting out skin.
You may have seen maps in books or online showing how people who live closer to the equator often have better health because they normally have more Vitamin D. This is true even of areas in temperate or northern zones. People in Tennessee have more Vitamin D than people living in Minnesota.
During a recent pandemic, scientists studied how geographic location affected how many people got infected, and how well they did.
The lower the latitude, the better they did - and the first impulse of scientists was to give the credit to Vitamin D. People in more southern areas have more Vitamin D.
But that couldn't be the explanation.
The study took place relatively far north - and during winter. It included Canada and Europe - where during the winters nobody gets any Vitamin D from sunlight.
Even in the temperate zone in the mid-U.S.A., the sunlight from October to April is too weak to produce Vitamin D.
Canada and Europe are even farther north. Those people wouldn't get any Vitamin D from sunlight even if they lay outside naked from sunrise to sunset on a sunny day. At that time of year, their sunlight's just too weak.
Yet, during the spread of this infectious disease, the more sunlight people experienced, the better they could resist the disease or the faster they recovered from it.
It wasn't Vitamin D, so it had to be the red+ spectrum.
History of Modern Red Light Therapy - Photobiomodulation
In 1893, the Danish Dr. Niels Ryberg Finsen began working with light as therapy. In 1903, Dr. Finsen won the Nobel Prize for Medicine. He used ultraviolet light to treat tuberculosis and red light on smallpox scars.
NASA experimented with using red lights to grow plants on board a spacecraft. During these tests, workers carrying out the experiments observed that red light exposure helped wounds on their hands heal faster.
Soon, NASA discovered that exposure to red light helped astronauts maintain muscle tissue despite spending lots of time in a zero-gravity environment.
In 2002, the Food and Drug Administration (FDA) approved a low level laser therapy device.
In 2008, the journal Photomedicine and Laser Surgery published a study that explained - for the first time - how red light improved health by increasing mitochondrial energy output.
In 2012, PlatinumLED produced the first red light device for horticultural use - raising plants.
In 2015, the same company produced the first red light device offering both a red light and near-infrared option - and intended for at-home use.
Skincare and Athletic Applications
Today, red light therapy is common and popular in spas and skincare clinics - and in sports medicine applications.
This is logical. No matter what red light does for your blood vessels, you can't see it.
But customers can see red light improves their complexions, hides their scars and reduces wrinkles.
As a customer, you also get the benefit of professional-level equipment, trained staff and established procedures.
Of course, you pay a lot for that. Check with your nearest spa or skincare professional.
And many athletes have benefited from the ability of red light to relieve pain and accelerate healing of torn muscles and ligaments.
Everyday Red Light
Although red light devices have helped many people in many ways, I believe it's also good for all of us to look for other ways to get red light into our dailhy lives.
We won't always have access to a machine. Life and schedules get in the way.
Let's say you don't have a specific health problem to relieve. Maybe you're fairly young.
REMEMBER: Chances are, you now get less red light in your daily life than you would have just 20 years ago - even living the exact same lifestyle.
All your light bulbs are now LEDs. Incandescent bulbs have been banned because LED bulbs are more "efficient." (Actually, they give off the same amount of light per kilowatt, but it's all visible and all limited by the bulb's frequency.)
Therefore, white LEDs are too "efficient" to emit light outside the set frequency - which cuts out the red spectrum we used to get from incandescent bulbs. That's energetically and financially more efficient, but may be causing adverse health outcomes.
That's going to get worse. Starting in 2028, new regulations will make LED bulbs even more concentrated.
New buildings have the outside of their windows treated to REFLECT red light. That lowers the cost of cooling the building, but it also reduces the amount of red light inside the building.
Here are tips to add more red light to your daily life.
1. If possible, use full spectrum sunlight bulbs. If not, use incandescent bulbs. If not, use halogen bulbs.
2. Safely get more red sunlight. That includes going outside near dawn and dusk. Wear light clothes and a hat outside.
When you're inside, try to get more sunlight through windows. Red and NIR light (though not infrared) frequencies penetrate glass.
3. Get out into vegetation. Chlorophyll reflects large amounts of red sunlight. That means your eyes get extra red light from greenery. Leaves, bushes, grass and trees - they reflect large amounts of red light.
It's likely this at least partially explains why people who live close to forest land and around trees have better health than those who don't.
Try to spend more time outside around plants. That could be your own lawn, garden and trees. Or visit a nearby park.
4. Burn candles - safely! Or, when appropriate, light your fireplace.
None of this will guarantee you a long, healthy life. But it will increase your chances, just because you'll be exposed to the amounts of red light most people who ever lived - until around 2010 - took for granted.
If you do have medical issues, you may still need a red light device.
How Deep Can NIR Go?
The red light field is full of color diagrams showing how deeply each color in the solar spectrum penetrates our skin.
This article has one, but it's a little different.
Notice: the infrared wavelengths don't penetrate the simple 4-5 inches usually described. Based on the results of a study published in July 2025, the higher frequencies have a deeper and wider impact on our bodies than previously known.
That is, once inside your body, that near-infrared light scatters. It appears to penetrate your entire body, because it affects all mitochondria, not just the mitochondria in your skin.
That's terrific news. It indicates that many red light therapies affect much more of your body than simply what's below the shining bulbs. This opens up the possibility of red light exposure helping our entire bodies - not just the skin or one body part.
It may make the device selection process simpler. If you want to use red light for general anti-aging, you're concerned about all your mitochondria.
And near-infared light trained on any part of your body benefits all your mitochondria. Therefore, you don't need to be so focussed on buying a full-body device or one in a particular shape.
Therefore, you can select the red light device that's most practical for you - knowing that using it on any part of your body will benefit all your mitochondria.
Blue Light is the Reverse
Although ultraviolet and blue don't penetrate your skin, somehow they affect your body with poor health.
We know blue light degrades mice mitochondria. Rodents exposed to lots of blue light have smaller livers and hearts, and live shorter lives.
There's no hard data regarding people, but many experts believe the past 15 years of "blue-ifying" the light we're all exposed to is having poor health consequences for people.
It's possible the lower production of mitochondrial energy under blue light is simply a result of the lack of balanced, full-spectrum light - including red+ frequencies.
Suggested Uses for Red Light Devices
1. Skin care and hair growth
This is the most obvious use case for a red light device. You may doubt that infrared light affects your mitochondria deep below your skin, but obviously red light does land on your skin.
Plus, because so many people wish to improve the appearance of their skin, there's a large market for using red light on it. And many spas, dermatologists and other skincare specialists employ red light therapy on their patients.
If it didn't work at all, it wouldn't remain so popular. Also, large numbers of scientific studies verify that red light improves wrinkles, fine lines, scars and rough skin - and increases collagen.
Collagen is the main component of your skin, and gives it strong support. Loss of collagen with age is one of the main causes of wrinkles and sagging skin, so increasing collagen is critical.
Red and infrared light also increase the amounts of elastin and hyaluronic acid in your skin. Like collagen, elastin is one of materials that supports your skin.
Hyaluronic acid is a natural sugar that attracts and holds water. Therefore, increasing it moisturizes your skin, making it both firmer and plumper.
More collagen + more elastin + more hyaluronic acid = fewer wrinkles and fine lines.
Red light decreases inflammation. That helps relieve red, itchy or angry skin, improving your skin's tone. It also makes your skin function better as a barrier, and to better accept skincare products.
Red light also improves pigmentation, discoloration and scars.
Your skin is stronger and more elastic.
That is, younger.
Red light of 650 nm on your scalp increases the thickness and density of your hair - helping with male pattern baldness and alopecia. The red light improves blood circulation, and the stimulation of mitochondria strengthens hair follicles. Plus, scalp inflammation is decreased, which improves hair growth.
2. Wound healing and pain
Red light doesn't change what your cells and organs DO - but, by stimulating mitochondria to make more ATP for energy, everything your cells do gets improved and speeded up.
Therefore, it's no surprise red light accelerates the healing of wounds.
Part of that is producing more collagen. It reduces inflammation. It increases the formation of new blood vessels - angiogenesis. It increases the strength and effectiveness of the fibroblasts. Those are connective cells that work with your collagen to create the extracellular matrix (ECM).
They play a critical role in maintenance of your tissues, including wound healing.
Red light is also appropriate and effective for arthritis, muscle aches and pain, and relieving strained joints and tendons. It's also great to use after a workout. By increasing ATP, it promotes faster muscle healing and recovery.
If you're a hardworking athlete, having a red light device on hand is almost a necessity.
3. Blood sugar control
Increased energy doesn't come out of thin air.
In a sense, red light ignites a fire under your mitochondria, jolting them to form more ATP.
But where does that energy actually come from?
A major source is sugar/glucose in our blood, from the food we eat.
Remember: blood sugar is so powerful, it's dangerous when too high, sort of like a corrosive acid.
Chronically high blood sugar is why diabetics have neuropathy (painful nerves) and decreased circulation. Their continual high blood glucose levels eat away at nerves and blood vessels.
Therefore, keeping blood sugar under control is important. That's why many people have taken to wearing devices that continually measure their blood sugar levels.
When we eat a small meal, our blood sugar goes up. That's fine and normal. We need to eat.
When we eat a large meal, our blood sugar goes way up. It spikes, before gradually returning to baseline.
Some people eat so much food, so often, their blood sugar levels never go down to an optimal healthy level except maybe while they're sleeping. In the long run, that's dangerous.
Anything that reduces the glucose spikes we experience after eating large meals (which we all do) can only help us.
And if you're one of those people who eats almost continuously from wake-up to bedtime, this red light application may help you avoid or delay diabetes.
In one experiment, researchers exposed bees to either red or blue light, then gave them glucose. The bees exposed to blue light saw large increases in blood sugar. In the bees exposed to red light, their glucose levels went up, but only slightly.
In another study, researchers gave people a glucose tolerance test. They had to consume a drink packed with sugar.
Then they all sat still for a while with a red light device shining on their back.
For half the participants, the device broadcasting invisible infrared light.
For the other half - the control group - the red light device generated no light whatsoever.
Because IR light can't be seen, none of the participants knew whether they were getting IR or not.
The control group had the expected response to downing a glass of supersweet sugar water. Their blood glucose levels spiked.
The group with backs exposed to infrared light saw their blood glucose go up, of course, but they did not have the spike. Their peak levels were much flatter. They saw an up to 27% reduction in blood glucose compared to the control group.
You can replicate this procedure simply by eating while the sun is up - in as much sunlight as possible.
4. Improved vision
This does not refer to relieving the types of vision problems we treat with glasses, such as near or far sightedness.
However, part of your quality of vision is about other factors. Our retinal sensitivity and color vision both tend to go downhill as we age, and we don't even notice.
Professor Glenn Jeffrey at UCL Institute of Ophthalmology ran a study of 24 people, ages 28 to 72. At the beginning of the study, researchers measured the rod and cone sensitivity of the participants' retinas.
For two weeks, they shone a small light of 670 nm into their eyes for just three minutes every morning. They could shut their eyes or not, as they wished, because lids don't block light that red anyway.
After two weeks, they were retested. The younger participants showed little to no improvement. But the ones 40 and over showed substantial improvement in their vision.
Their cone color contrast sensitivity rose by up to 20 percent. The ability to see in low light (rod sensitivity) also increased, though not by that much.
Remember: you have more mitochondrial density in your retina than in any other part of your body, even your heart.
If you're 40 or over, your eyes need some red light to juice up those mitochondria. As we grow older, our rods start to die. But red light reduces that.
5. Brain function
Research on this is just beginning.
Studies have shown red light therapy improving Alzheimer's Disease in mice, increasing their memories. The light activated formaldehyde dehydrogenase (FDH), thereby reducing formaldehyde levels in the mice brains.
Similarly, red light therapy has improved neuroprotection and locomotor behavior in such animals as rodents and apes with Parkinson's.
Red light, along with white light, helps patients with Seasonal Affective Disorder.
Much more research is needed, but red light to our brains may help improve many mental and emotional disorders, including brain fog and depression.
How can we shine red light on our brains without opening up our heads? Easy. The long wavelengths of light penetrate not only our skin, but our bones, including our thick skulls.
There is a helmet-like red light device that penetrates transcranially. That is - into your brain.
This is said to improve cognition by energizing brain mitochondria, enhancing blood flow to the brain and reducing inflammation.
We may discover near infrared light actually makes us smarter. Or, at least, allows us to more effectively use the brains we were born with.
6. Anti-Aging
(NOTE: I've noticed some marketers apply the "anti-aging" label to products that simply make people appear younger than they are. There's nothing wrong with wanting to look better, but - to me - "anti-aging" means just that: staying younger longer. "Staying" younger, not simply LOOKING younger.)
Obviously, we have no long-term data on the health status and life expectancies of people who regularly use red light devices for many years.
Therefore, I can't say red light will extend your life or even your healthspan.
But it is showing great promise at increasing mitochondrial energy. That's practically the fountain of youth.
Your mitochondria can't and don't do everything - but everything your body does from seeing to thinking to digesting to repairing wounds requires energy. If your mitochondria are as weak and feeble as you may feel, that's a major reason you feel so old.
If your mitochondria have the energy of a 20-year-old, your cells and your organs will function accordingly.
Over time, they'll make the effort to repair whatever damage time and poor health habits have already inflicted on your body.
It's not dramatic, but red light is the closest thing to a true fountain of youth I can think of.
Your mitochondria can't by themselves strengthen your bones, increase your VO2max or lower your LDL cholesterol.
However, they DO power the cells and organs responsible for such higher level functioning.
But Red Light Can't Push You Up a Hill
Red light is terrific, but don't expect it to 100% compensate for your unhealthy lifestyle habits.
Red light helps, but it can't totally undo a poor diet, tobacco use, lack of exercise, too many adult beverages, too little sleep or too much stress.
Red light is powerful, but it isn't a magic bullet.
In Case the Subject of Irradiance Comes Up . . .
One important measure of any red light device is "irradiance."
This is the measure of how intense the light is.
The formula is: mW/cm2 .
That's: milliwatts per square centimeter.
That is, how concentrated is the red light energy landing on any specific spot of your body.
Unfortunately, so far as I can see, there's a wide range of recommendations by experts for the amount of irradiance you want.
A lot will depend on your purpose for investing in a red light device.
If you're concerned about your facial complexion - or anything close to your eyes - you'll want a low irradiance.
If you are addressing a chronic illness, including old age, you'll want more power.
When you're shopping, make sure you check out all the models that might help your problem or condition.
Follow the recommendations of the manufacturer. Also, if there's a medical issue, follow your doctor or therapist's instructions.
A strong red light will feel warm, but shouldn't get hot.
Unless you have a specific need, 20 to 30 minutes seems to be the most time for any one day.
Use consistently, but every day may be too much. Depending on your specific condition, 3 to 5 days per week may be enough.
If your skin turns red, itches or you get a rash - discontinue.
Some users have reported that "ODing" on red light made them more tired instead of energetic, and caused joint pain.
If your symptoms get worse, stop using the device.
You Must Weigh Your Needs Against Your Fiscal and Time Budgets
You can buy a small red light flashlight for under $20, but you'll have to point it at the specific skin area you're targeting.
You can also buy a red light enclosed "bed" - that looks like a pod out of a science fiction movie - for over $100,000.
Do look for a device providing a multiple number of wavelengths.
They all produce a visible red light, maybe 640 nm to 670 nm.
However, remember, visible red light doesn't penetrate very deeply. It can certainly benefit your skin, and if you're sure that's all you want, fine.
But the deeper benefits come from IR and NIR.
Many machines are combo devices. They produce a visible red light and at least one NIR wavelength.
More frequencies will give you multiple depths of penetration, doing the most good possible.
However, more than two frequencies will be more expensive.
WARNING: Do NOT use a red light device if you're:
* Pregnant
* Have epilepsy or other seizure disorder
* Have lupus or other condition that makes you photosensitive
* On a medication that makes you photosensitive, such as antibiotics and retinoids
Always protect your eyes. Many devices come with protective goggles. Use them.
Buyer Beware
Decide on your specific needs and goals, and then search for products that fit you at a price you can afford.
Read the reviews on Amazon and other sites. Watch the product review videos on YouTube.
The well-known brands are normally the most reliable, but some are quite expensive. Like many things, though, more expensive is not necessarily better. It depends on what you're getting for your money, and what you need to attain your health goals.
The older you are, the more red light functionality you want, without breaking the bank. Remember: old age is a chronic disease that's inevitably fatal.
Prolonging that end is the whole point.
Science has no proof (yet) red light extends life, but give your tired old mitochondria a fighting chance.
References:
https://www.youtube.com/watch?v=iT8W6kaD-RA&t=5310s
https://www.youtube.com/watch?v=4ET7XM_mTys
https://www.youtube.com/watch?v=Hy8G5TKxiLY&t=2s
https://www.youtube.com/watch?v=Hy8G5TKxiLY&t=2879s
https://www.youtube.com/watch?v=tOEcYvpoQRM
https://www.youtube.com/watch?v=nNdBDPXIvSc
https://www.youtube.com/watch?v=4TG4I3cBjyk
https://www.youtube.com/watch?v=VJ9-6dELvbg
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https://platinumtherapylights.com/blogs/news/the-history-of-red-light-therapy
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https://www.youtube.com/watch?v=YNfVV8e3MyQ
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https://en.wikipedia.org/wiki/Hyaluronic_acid
https://www.physio-pedia.com/Red_Light_Therapy_and_Muscle_Recovery
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https://www.nature.com/articles/s41598-023-47039-2
https://pmc.ncbi.nlm.nih.gov/articles/PMC5436350/
https://www.youtube.com/watch?v=-x_XQcPUxY0