Among the many wellness modalities out there, two types of light therapy often take the spotlight: blue light and red light. They both harness light at specific wavelengths to support healing, but their effects, reach, and applications differ significantly.
Let’s explore how each works, what they may help with across people, dogs, and horses, and why red light, particularly at 830 nm, often delivers the most reliable outcomes, especially for deeper, long-term healing.
Blue Light: Gentle Surface-Level Support
Blue light therapy, typically operating at around 415 nm, is best known for its role in supporting surface-level skin health. This shorter wavelength doesn’t penetrate deeply into tissue, but it interacts meaningfully with the outermost layers of skin, particularly where oil glands, pores, and acne-causing bacteria are most active.
Blue Light for Skin Health and Acne
Its most well-known application is in acne management. Blue light may help by targeting the bacteria commonly implicated in inflammatory breakouts. When exposed to blue light, these bacteria produce reactive oxygen species, essentially “self-destructing” in the process. The result, when treatment is applied consistently, may be a mild reduction in active breakouts, particularly in mild-to-moderate acne cases.
Beyond acne, blue light may also play a role in calming redness, reducing oil production, and improving the appearance of blemishes over time. However, the impact tends to be modest and best suited for superficial concerns rather than deep repair or chronic inflammation.
Potential Risks and Combinations with Red Light
Importantly, blue light is sometimes used as part of a combination therapy, often paired with red light to achieve both anti-bacterial and anti-inflammatory effects.
Still, it’s worth noting that excessive or improperly applied blue light, particularly from unregulated devices, can potentially disrupt the skin barrier or contribute to dryness, so device quality and usage duration do matter.
Veterinary Use of Blue Light in Dogs and Horses
In veterinary applications, blue light therapy is less common but emerging as a potential support for minor skin conditions. Its role here is quite similar to human use: surface-level action, focused largely on reducing localised bacteria and possibly assisting with wound environments that are at risk of mild infection.
In dogs, some practitioners use blue light to manage superficial wounds, hot spots, or minor surgical incisions. It’s not a substitute for antibiotics or wound care protocols, but it may help as a secondary measure to keep bacteria in check and support the healing environment, especially in early stages where inflammation is localised and the tissue is not too deep.
Equine-Specific Research and Applications
In horses, the use of blue light is still relatively new, but researchers have begun investigating how light cycles and specific wavelengths influence coat condition and shedding. Some equine studies are experimenting with blue light to mimic longer daylight hours, potentially helping with seasonal coat control, though its use remains more experimental than therapeutic in these cases.
As with any emerging modality, consistency, accurate wavelength delivery, and veterinary oversight are key. Not all devices deliver blue light evenly or at effective intensities, and animals, especially horses, may move or react unpredictably during treatments. Eye protection is critical, as blue light is particularly bright and can irritate sensitive tissues.
Watch Our Interview with Equine Therapist Kelly Cracknell on the use of Red Light Therapy
The Case For Blue Light Therapy
Blue light therapy may offer gentle support for surface-level skin conditions, whether you’re managing a teenager’s breakouts, a dog’s itchy hotspot, or exploring experimental care in horses. It’s not a deep-acting solution and generally won’t address chronic inflammation or tissue damage, but when used thoughtfully, it can play a supportive role in skincare and mild wound management.
Red Light Therapy: Deeper, Cellular Renewal
When it comes to therapeutic depth and cellular regeneration, near-infrared light (830 nm) is the standout wavelength in light therapy. Unlike blue light, which only affects the uppermost layers of the skin, these longer wavelengths penetrate deeply, reaching beneath the skin’s surface into muscle, fascia, joints, and even some bone-adjacent tissue.
The key to their impact lies in how they interact with the mitochondria, the powerhouses of our cells. This improved mitochondrial function can accelerate healing, modulate immune responses, and increase blood flow by triggering the release of nitric oxide, a natural vasodilator.
Applications for Humans: From Pain Relief to Recovery
In human applications settings, the use cases are vast. From easing chronic joint pain and muscle tension to promoting collagen production in the skin, red light therapy is widely used for both rehabilitative and cosmetic outcomes. A growing number of studies support its efficacy. Its non-invasive nature and minimal side effects have made it increasingly popular among physiotherapists, dermatologists, and even professional athletes. Understandably, some people are curious about the safety of repeated use, particularly in relation to cell behaviour and long-term exposure. If that’s something you’ve wondered about, we’ve addressed it in more detail here.
Red light has also been explored in managing symptoms of neuropathy, delayed-onset muscle soreness (DOMS), and the healing of scar tissue. Its non-invasive nature and minimal side effects have made it increasingly popular among physiotherapists, dermatologists, and even professional athletes. Some sports teams have incorporated near-infrared systems into their recovery routines due to the therapy’s ability to improve circulation, lymphatic flow, and muscle oxygenation.
Notably, while red light (around 660 nm) is more often associated with skin-level benefits (like collagen induction and wrinkle reduction), it’s 830 nm near-infrared light that delivers the deepest tissue effects, making it ideal for those with musculoskeletal issues, including arthritis, joint stiffness, or chronic inflammation.
Discover How An Equestrian Olympian, Sonja Johnson Uses Red Light Therapy
Veterinary Use of Red Light
In veterinary care, red and near-infrared light therapy is commonly used to support healing, reduce pain, and maintain mobility, especially in ageing pets or those recovering from surgery or injury.
For dogs, therapy with 830 nm near-infrared light has been shown to accelerate wound healing, increase joint mobility, and provide natural pain relief in cases of arthritis, ligament injuries, and post-operative recovery.
The general consensus is that red and near infrared light therapy is safe, well-tolerated, and likely beneficial when part of a broader multimodal care plan.
Recovery and Performance Support With Red Light Therapy For Horses and Dogs
In horses, red and near-infrared therapy is increasingly being used in sports medicine and performance care. Equine practitioners report positive outcomes in cases involving muscle soreness, tendon repair, joint stiffness, and even back and sacroiliac pain. Some equine-specific studies show that regular treatments can improve muscle fibre activation, reduce inflammation in the limbs, and shorten recovery times after intense exertion or minor injury.
Owners of older dogs or arthritic horses often find that regular near-infrared treatments help maintain functional movement, reduce reliance on medications, and improve quality of life, especially when paired with exercise, joint support supplements, and physical therapy.
The Case For Red Light Therapy
Red and near-infrared light therapy offers deep-reaching, well-researched benefits for both humans and animals. It excels at treating inflammatory conditions, soft tissue damage, joint pain, and sluggish healing responses, all without the invasiveness of drugs or surgery.
Whether it’s used for chronic pain in a senior dog, post-workout muscle soreness in an athlete, or joint inflammation in a performance horse, this form of therapy taps into the body’s natural ability to regenerate and repair. Compared to blue light, which works only on the surface, red and near-infrared light consistently deliver stronger, more systemic effects, making them the preferred option for deeper, cellular-level support.
Choosing What’s Right for You
At the end of the day, choosing between blue and red light therapy isn’t about declaring a winner; it’s about understanding your needs and aligning them with the strengths of each modality.
Blue light therapy may be helpful for more superficial concerns, like acne, surface wounds, or mild skin irritation. It’s gentler, surface-level action makes it a reasonable option for those seeking non-invasive skin maintenance. Red light therapy, on the other hand, tends to offer broader and deeper-reaching benefits, especially when used consistently.
Our Australian-made therapy kits are centred around 830 nm near-infrared light, a wavelength we believe offers an ideal balance of safety, depth, and proven efficacy. But the final choice is yours, guided by the outcomes you’re aiming to support.
Final Thoughts
Whether you’re caring for yourself, your dog, or your horse, we hope this article has helped clarify the core differences between blue and red light therapy. By understanding how each modality works, and where it shines, you’re better positioned to make a confident, informed decision that aligns with your goals, lifestyle, and wellbeing.
If red light therapy feels like the right fit, we’re here to help you get started with safe, effective tools built for both human and animal care.
Proudly Australian-made, we invite you to explore our stories, browse our range, or reach out anytime, take care and stay well.
Content Reviewed by Susan Poole BPE MEd