Red Light Therapy: What It Is, How It Works, and Why People Love It
You've probably seen it on social media — someone lying in a glowing red bed looking very relaxed. But what is red light therapy actually doing? More than you might think.
Red light therapy has been around longer than most people realize, and the research behind it keeps growing. The idea is simple — specific wavelengths of light are absorbed by your cells and help your body do what it already knows how to do, just better. No UV, no heat, no downtime. You just lie back and let the light work.
Red light therapy uses two types of wavelengths — visible red light and near-infrared light. The 630nm and 660nm wavelengths are visible red light that work at the skin's surface and upper layers. The 850nm wavelength is near-infrared, meaning you can't see it, but it penetrates much deeper — all the way into muscle, joint, and bone tissue.
What It Does for Your Skin — Collagen, Wrinkles, and Glow
630 nm660 nm
Red light is probably best known for what it does for skin — and for good reason. The 630 and 660nm wavelengths stimulate the cells responsible for producing collagen, the protein that keeps skin firm, smooth, and youthful.
Over time, consistent sessions lead to firmer skin, reduced fine lines and wrinkles, and a more even tone. It also calms inflammation at the surface, which is great for redness and post-breakout healing. Results are gradual because your skin is genuinely rebuilding — and that means they last.
Muscle, Joint & Bone Recovery — The Deep Work
850 nm
The 850nm near-infrared wavelength goes past the skin entirely and reaches your muscles, joints, tendons, and bone. It stimulates your cells to produce more energy, which your body uses to repair and recover.
For muscles, that means less soreness and faster recovery. For joints, it helps reduce the inflammation behind chronic aching and stiffness — something people with arthritis or old injuries often notice with regular sessions. It has also been shown to support bone density, making it worth considering as part of a long-term approach to healthy aging.
Whether you're an athlete, a desk worker, or someone navigating the aches that come with getting older — near-infrared light works at the level where healing actually happens.
Cellular Oxygenation & the Alzheimer's Research Connection
850 nm
One of the more fascinating areas of red light research involves the brain. The 850nm near-infrared wavelength helps cells absorb and use oxygen more efficiently. When researchers started studying what that means for brain health, the findings were eye-opening.
Alzheimer's disease is marked by reduced energy production and poor blood flow in the brain — cells that are struggling to function. Near-infrared light appears to help oxygenate that compromised tissue, reduce brain inflammation, and support the energy production neurons need to work properly. Early studies have shown improvements in memory, mood, and cognitive function in people with early-stage Alzheimer's and mild cognitive decline. The research is still evolving, but what's been found so far is genuinely promising.
Emerging studies suggest that near-infrared light can improve oxygenation in brain tissue, reduce amyloid-related inflammation, and support cognitive function in ways that, just a decade ago, would have seemed impossible from a light source.
A Little Goes a Long Way — Consistently
Red light therapy works best when it becomes a regular part of your routine. One session feels good. Several sessions over weeks is where people really start to notice a difference — in their skin, their energy, how their body recovers, and how they feel overall.
SolVita Wellness Spa in Tigard, Oregon offers full-body red light therapy on a 630, 660, and 850nm bed — sessions available individually or through membership.
SolVita Wellness Spa · 14250 SW Barrows Rd, Suite 1 · Tigard, OR 97223 · 503.521.7979
Recovery · Regeneration · Nervous System Regulation
Locally owned in Tigard, Oregon