What is red light therapy?

Red light therapy is frequently used as a broad term to describe light emitting diode (LED) therapy, also known as photobiomodulation or low-level light therapy (LLLT), which is the application of specific wavelengths of light energy to tissue to achieve therapeutic benefits. This non-invasive treatment is effective for addressing various conditions, including acne, aging skin, pain, hair restoration, excess fat, and more. The absorbed light energy enhances cellular performance, promoting self-repair and rejuvenation.

Phototherapy, particularly LED red and near-infrared light therapy, is well-researched and supported by thousands of peer-reviewed clinical studies from prestigious institutions worldwide. This clinically validated technique has gained widespread global adoption in mainstream medicine with dermatologists, cosmetic and general surgeons, and pain management professionals globally.

Benefits of Red Light Therapy

Red and near-infrared light therapy is a safe, non-invasive treatment that offers a wide range of benefits, including:

Skin Health & Wrinkle Reduction

Pain Relief For Muscles & Joints

Reduced Inflammation

Improved Circulation

Promotion of Hair Growth

Non-destructive Body Contouring

Woman lying under a Celluma LED device receiving a facial treatment with a combination of blue, red, and near infrared light therapy. Woman lying under a Celluma LED device receiving a facial treatment with a combination of blue, red, and near infrared light therapy. Woman lying under a Celluma LED device receiving a facial treatment with a combination of blue, red, and near infrared light therapy. Woman lying under a Celluma LED device receiving a facial treatment with a combination of blue, red, and near infrared light therapy.

Benefits of Red Light Therapy

Red and near-infrared light therapy is a safe, non-invasive treatment that offers a wide range of benefits, including:

Skin Health & Wrinkle Reduction

Pain Relief For Muscles & Joints

Reduced Inflammation

Improved Circulation

Promotion of Hair Growth

Non-destructive Body Contouring

How Red Light Therapy Works

  • Celluma Step 1 Celluma Step 1
  • Celluma Step 2 Celluma Step 2
  • Celluma Step 3 Celluma Step 3
  1. STEP 1

    Light Energy Emitted As Photons

    Light therapy works by emitting particles of light (photons) at specific wavelengths like red and near infrared light.

  2. STEP 2

    Photons are absorbed in the mitochondria

    In our cells, light energy is absorbed by photoacceptors in the mitochondria.

  3. STEP 3

    Increased ATP causes a cascade of metabolic events

    The resulting elevation of ATP (adenosine triphosphate), or cellular energy, is used to power metabolic processes to repair or regenerate cell components and foster mitosis, cell proliferation, and restore homeostasis.

Mitochondria - The Powerhouses of the Cell Mitochondria - The Powerhouses of the Cell

The Mighty Mitochondria

Boosting Cellular Energy With Red Light Therapy

Research indicates that the mitochondria in our cells absorb particles of light (photons) and transform light energy into adenosine triphosphate (ATP), the form of energy that cells utilize. The resulting elevation of ATP is then used to power metabolic processes, synthesize DNA & RNA proteins, enzymes, and other products needed to repair or regenerate cell components. It also fosters mitosis, or cell proliferation, and restores homeostasis. Simply put, red light therapy provides compromised cells with increased energy so cellular performance, repair, and rejuvenation is enhanced naturally.

What is Medical-grade red light therapy?

Medical-grade red light therapy is an advanced, non-invasive treatment that uses specific wavelengths of red and near-infrared light to penetrate the skin, promoting cellular regeneration and reducing inflammation. FDA-cleared red light therapy technology is widely used in medical and aesthetic practices to accelerate healing, reduce pain, and improve skin health.

How Does Medical-Grade Red Light Therapy Work?

Red light therapy works by emitting low-level wavelengths of red and near-infrared light that are absorbed by the mitochondria in your cells. This process enhances cellular energy production, which stimulates tissue repair and boosts the production of collagen and elastin. Medical-grade devices like Celluma offer precise dose of light energy, ensuring optimal therapeutic benefits.

What are the benefits of Medical-Grade Red Light Therapy?

  • Skin Health: Stimulates collagen production to improve skin elasticity and reduce the appearance of fine lines, wrinkles, and restores the skin to a healthier, more youthful appearance.
  • Pain Relief: Helps reduce chronic and acute pain, including joint and muscle discomfort, by increasing circulation and reducing inflammation. It is effective for treating pain associated with arthritis.
  • Muscle Recovery: Releases nitric oxide and to increase blood flow and the delivery of oxygen and nutrients to tissues, relieving muscle injury, cramps, and spasms.
  • Acne: Blue light kills acne-causing bacteria in the surface of the skin, while red light therapy reduces redness, inflammation, and increases microcirculation.
  • Hair Growth: Red light improves the health of your scalp and hair follicle to prevent hair loss, increase follicle size, and regrow hair.
  • Body Contouring: Red and near-infrared light penetrates into the subcutaneous layer to target and shrink adipose (fat) cells. Light energy activates cells to create temporary pores in cell membranes. This allows lipids to leak out and be metabolized by the body, slimming the target area.
  • Non-Invasive and Safe: Provides an effective treatment with no downtime, making it ideal for both professional and at-home use.

Why Choose Celluma for Medical-Grade Red Light Therapy?

Celluma devices are trusted by healthcare professionals in over 100 countries and designed to deliver clinically proven, medical-grade results. Our patented, flexible, FDA-cleared devices allow for close proximity to the skin, offering targeted treatments for a variety of conditions, including pain management, skin rejuvenation, and more. The ergonomic design ensures maximum coverage and comfort during each session.

Read More

Patented Shape-Taking Design

The distance between the light source and treatment area is critical for successful outcomes.


Human bodies are not flat. Thus, maintaining a consistent proximity between the body and the light source is crucial in delivering the optimal dose of light energy to our cells. Which is why we designed and patented our award-winning, flexible, shape-taking technology that allows anyone to contour Celluma LED panels as close as possible to the skin for getting just the right dose of uniform light energy for safe, effective results.

Learn about the Celluma Difference

Not all LED light therapy devices are created equal. Celluma is the innovation leader in FDA-cleared, professional-grade, medical-grade LED light therapy solutions. We are trusted every day by tens of thousands of loyal customers, doctors and clinicians in 100+ countries. Read more about why there's only one Celluma.

The Science of Red Light Therapy and the Skin

When it comes to aging, a significant factor that leads to wrinkles, fine lines, and joint pain is due to inadequate levels of collagen and elastin. Collagen is the main structural protein found in your skin and other connective tissue. Collagen literally holds our bodies together. An easy way to remember what collagen does is to look at the Greek prefix ‘kolla’ which means glue.

Increasing Fibroblast Production

Low-level light therapy increases cellular energy production, targeting a variety of cells. Fibroblast cell proliferation is just one benefit of LED red light therapy. Fibroblast cells play a critical role in the body's healing and tissue maintenance processes. They are a type of cell found in connective tissue that produces and maintains the extracellular matrix (ECM), which provides structural support to tissues. The main functions of fibroblasts are to increase collagen and elastin production, heal and repair tissue, and support immune response, particularly during injury or infection.

Increased Collagen

Healthy collagen levels are what give us a glowing complexion, firm skin, strong nails, dense bones, and healthy hair. It is also essential in keeping muscles, joints, and tendons in healthy working order. Simply put, the more our bodies produce collagen, the better we’ll look and feel as we age and attempt to delay tissue and cell degeneration. Collagen is a key factor to longevity.

Increased Elastin

Elastin, along with collagen, is a key component of the extracellular matrix, helping skin, blood vessels, and other connective tissues maintain their flexibility. Elastin allows tissues to stretch and then return to their original shape, which is particularly important in areas like the skin, lungs, and arteries. Over time, elastin production decreases, contributing to the loss of skin elasticity and the formation of wrinkles as we age.

Read More

Clinical Research for Red Light Therapy

Thousands of studies over the last 50 years demonstrate clinical proof of an ever-growing number of biological effects and therapeutic benefits from the application of low-level LED light therapy and red light therapy to the human body.

  • Low-Level Light Therapy

    Keys to Effective Low Level Light Therapy (LLLT). Stanford School of Medicine, 2016

    The Nuts and Bolts of Low-level Laser (Light) Therapy. PubMed, 2012

    Mechanisms and applications of the anti-inflammatory effects of photobiomodulation. PubMed, 2017

    Biphasic Dose Response in Low Level Light Therapy. PubMed, 2009.

  • Aging Skin

    Low Level Light Therapy with Light-Emitting Diodes for the Aging Face. Clinics In Plastic Surgery, 2016

    Low Level Laser (Light) Therapy (LLLT) for Cosmetic Medicine and Dermatology. Photobiology.info, 2014

    Light-Emitting Diodes (LEDs) in Dermatology. PDF: Elsevier, 2008

    Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring. PubMed, 2014

  • Other Conditions

    We've hand-picked dozens of clinical studies that demonstrate the benefits of proven wavelengths such as red light, blue light, and near-infrared light for treating skin conditions, acne, hair growth, and non-invasive body contouring.

WE'RE HERE TO HELP

Frequently Asked Questions

  • Red light therapy, or Low-level-light therapy, is based on Light Emitting Diode (LED) technology and is the application of specific wavelengths of light energy to the body for therapeutic benefits. It promotes a natural photobiochemical reaction similar to the process of plant photosynthesis. Just like plants, humans absorb red and infrared (IR) light energy into the mitochondria within our cells, transforming into energy (ATP) and producing a cascade of metabolic effects and proven health benefits.

    Think of it as giving your skin, body, and hair a natural energy boost. By penetrating deep into the tissues, this light therapy helps to improve blood circulation and enhance the activity of your cells, encouraging them to repair, regenerate, and function more effectively. This process can lead to healthier skin, reduced inflammation, relief from muscle and joint pain, and for your hair, it means stronger roots, less shedding, and even new growth.

  • Red light therapy can benefit a wide range of individuals, including:

    • Athletes & Active People: Helps with muscle recovery, reduces inflammation, and improves performance.
    • People with Pain: Relieves pain associated with arthritis, joint stiffness, and other inflammatory conditions.
    • Those Seeking Skin Rejuvenation: Reduces fine lines, wrinkles, and improves the texture and appearance of skin.
    • People with Acne: combined blue and red light therapy can effectively kill acne bacteria, reduce redness & inflammation, and increase circulation.
    • Men & Women with Hair Loss: Red light therapy is proven to grow and regrow hair and improve overall scalp health.
    • Those looking to lose some extra inches: red and near-infrared light penetrate deeply into the subcutaneous, shrinks fat cells, and reduces the circumference of the hips, waist, and thighs.
    • Pets! Yes, your little furry friends can benefit from red light therapy to treat all the same things for humans, like injury recovery or treating skin conditions.
  • Yes. Red light and near-infrared light penetrate deep into the tissue to manage a variety of types of pain, including acute and chronic conditions such as arthritis.

    It works by stimulating mitochondrial energy production in cells. The up-regulation of ATP promotes increased circulation, reduces inflammation, and helps to reduce swelling of the treated areas.

    Clinical studies have shown that red and near-infrared light therapy can reduce pain in conditions such as osteoarthritis, chronic low back pain, and musculoskeletal injuries. It is often used by physical therapists, chiropractors, and pain specialists due to its effectiveness, safety, and non-invasive nature.

  • Red, near-infrared (NIR), and infrared (IR) light are all part of the electromagnetic spectrum, but they differ in their wavelengths and how they interact with human tissues. Here's a breakdown of the differences:

    Red Light (Visible Light)

    • Wavelength: 620–700 nm
    • Penetration Depth: Red light penetrates the skin up to about 5 mm.
    • Uses: Red light is primarily absorbed by the skin and is often used in therapies aimed at improving skin health. It stimulates fibroblasts, enhances collagen production, and helps with skin rejuvenation, wound healing, and acne treatment.
    • Celluma devices use 640nm red light.

    Near-Infrared Light (NIR)

    • Wavelength: 700–1400 nm
    • Penetration Depth: NIR light penetrates deeper into the body, reaching muscles, joints, and even bones. The penetration depth ranges from a few millimeters to several centimeters depending on the wavelength.
    • Uses: Near-infrared light is used for more profound therapeutic effects, such as reducing muscle and joint pain, accelerating tissue repair, and promoting wound healing. It is also used for deeper tissues like tendons and bones.
    • Celluma devices use 880nm NIR light.

    Infrared Light (IR)

    • Wavelength: 1400 nm and beyond (up to 1 mm)
    • Penetration Depth: Infrared light penetrates the deepest of the three, although much of its energy is absorbed as heat. It can reach deeper tissues, but it is not as commonly used in light therapy due to its high heat generation.
    • Uses: Infrared light is primarily used for heat therapies, such as in infrared saunas. It can improve circulation and promote relaxation, but it’s less commonly used in medical or aesthetic treatments compared to red and near-infrared light.
    • Celluma devices do not use wavelengths above 880nm (NIR).

    Summary of Key Differences:

    • Red Light: Visible, shallow penetration, used for skin health and surface-level healing.
    • Near-Infrared Light: Invisible to the human eye, deeper penetration, used for muscle, joint, and deeper tissue repair.
    • Infrared Light: Deeper penetration but mostly absorbed as heat, used for heat-based therapies.

  • While red light therapy is primarily used for skin rejuvenation, hair growth, and pain relief, blue light therapy is often used to target acne-causing bacteria. Both have their own unique benefits, and all of Celluma devices come with treatments that emit blue, red, and near-infrared light for a synergistic effect for comprehensive skin care.

  • Absolutely, red light therapy devices are widely available for home use. Celluma makes medical-grade, FDA-cleared devices that have multiple treatment modes and are approved for over-the-counter (OTC) use. With our patented, shape-taking, flexible, battery-powered LED panels, we make it easy to experience the benefits of professional-grade red light therapy in the comfort of your own home or anywhere life takes you.

  • There are several distinct advantages only found with Celluma.  Here's a few...

    Revolutionary Flexibility and Shape-ability

    Celluma stands out with its patented flexible, shape-taking design, designed to contour around the body, ensuring optimal delivery of light energy to the body. It also eliminates the need for stands, cradles, and other supports.

    Multiple FDA-Cleared Treatment Modes

    If you find a single Light Therapy device FDA cleared with two, three or even four different treatment modes, you are probably holding a Celluma.  This makes them so useful to everyone in your house, because you can select a combination of therapies from treating hair loss, wrinkles and aches and pains, to acne and even body contouring. 

    Highly effective yet light-weight and portable

    Most of our Celluma devices now featured a battery-powered option, freeing you from the constraints of power outlets, enhancing mobility and ease of use. We have the only battery-powered devices in an LED panel configuration. They are made from medical grade components that are designed to be durable, yet lightweight and travel-ready.  Even our largest device, the full-body Celluma DELUX is an amazing advancement over weight and heft of LED treatment beds because it stores so easily, hanging on a closet door out of the way when you are not using it.

    World-Class Medical Credentials

    The entire Celluma SERIES holds the distinction of being the most medically credentialed LED device globally, as well as the most award-winning. This recognition underscores its exceptional quality and effectiveness. You know you can trust the Celluma name because our products have been selected as the preferred light therapy devices by medical professionals, certified aestheticians and high-end Spa operators throughout the USA and in over 100+ countries worldwide.

    Leading the Market

    The Celluma PRO and multi-panel Celluma CONTOUR are renowned as the most popular and versatile devices available, trusted by professionals and users alike for their superior performance and adaptability. Every other Celluma device is made of the same quality materials, with different sizes and treatment options to fit any budget.

    Experience the Celluma difference – a fusion of innovation, flexibility, and proven results.

  • LED Light Therapy is a highly safe and non-invasive treatment, making it suitable for all skin types and ages. Unlike other light-based treatments, it doesn't use UV rays, so there's no risk of burning or skin damage. The light emitted by the LEDs penetrates the skin gently, promoting healing and rejuvenation without any discomfort or downtime.

    This therapy has been extensively studied and used in clinical settings for decades, with a strong track record of safety. Celluma follows the science of safety and efficacy very closely and that is why it has been FDA-cleared for various applications, including skin care, hair restoration, and pain management. The vast majority people experience no side effects, and the treatment is so gentle that it can be used regularly to maintain skin and hair health.

    However, there are some important contraindications to consider:

    • All photo-sensitive drugs are a contraindication for low-level light therapy.
    • Allow 3-5 days before administering light therapy and consult your doctor if you have recently been taking photo-sensitive prescriptions.
    • Do not use if you are on steroidal medication – injections only.
    • Do not use it over a pregnant belly (but you can use it over the face).
    • Do not use if you have a history of epilepsy or seizures.
    • Do not use over any cancer or any known metastasis before getting clearance from your doctor(s).

    In all of the above, or with children under 12, always consult your primary care physician before using Celluma or any light therapy product.

  • We have an array of options for everyone's needs and budget.

    All of our devices use the same premium, medical-grade LED technology, and deliver the same light energy output and effectiveness per square centimeter of treatment area.

    Our devices differ in 2 ways: size and what treatment modes they are programmed with.

    LED Size Options

    We have five options from smallest to largest:

    • Mini Handheld device
    • Small Single LED panels
    • Large Single LED panels
    • Multi-panel LED devices
    • Full-Body LED blankets

    The Large Single LED panels (like the #1 best-selling Celluma PRO) have more LED's and cover a 30% larger surface area than the Small Single LED Panels. More coverage = faster results.

    For facial treatments, the Large panels cover from the hairline to the chin. The Small panels (like the Celluma RESTORE) cover from eyebrow to chin.

    The CONTOUR is our flagship multi-panel option, and supports up to 3 large panels for 3x the coverage of the Celluma PRO.

    The DELUX & DELUX XL are our full-body LED options in two sizes.

    Treatment Programs

    Choosing the right program is all about your needs and what conditions you are trying to treat.

    Celluma devices come with 1-5 FDA-cleared programs. They are:

    • Acne
    • Wrinkles
    • Contour
    • Hair Growth
    • Aches & Pains

    Each program is a different proprietary algorithm that runs on a microprocessor to control a number of variables such as light wavelength, energy dose, pulsed light, and light wave modulation in order to provide optimized results that are based on clinical outcomes.

    Recommendations

    For faster results, we recommend investing in at least a Large Single LED panel, like the PRO. This is the preferred size for facial treatments and pain relief.

    For the most treatment options and coverage, we recommend the 3-panel, 4-mode Celluma CONTOUR.

    For maximum portability and treating smaller areas of the body, the Small Single LED panels like the HOME, FACE, RESTORE, and LITE are great options. The Mini POD is great for spot-treatments.

    For Hair growth, the only FDA-cleared device for growing and regrowing hair is the RESTORE.

    And for the ultimate experience in full-body LED light therapy, the DELUX Series are the way to go.