How light becomes biology

When specific wavelengths of red and near-infrared light reach the body, researchers have observed a range of cellular responses — driven not by heat, but by photochemical reactions at the cellular level. Much of the research points to the mitochondria. Studies suggest a protein called cytochrome c oxidase absorbs red and near-infrared photons, which may support electron transport chain efficiency and ATP (cellular energy) production. This area of study, known as photobiomodulation (PBM), has been explored in thousands of published papers spanning recovery, skin health, sleep, and general wellness.

660nm — Red Light

Absorbed primarily at the skin and surface tissue. Targets collagen production, skin tone, wound healing, and surface-level inflammation. Visible as a warm red glow during use.

850nm — Near-Infrared

Penetrates deeper — past skin into muscle, joint tissue, and bone. Targets cellular energy production, deep tissue recovery, joint inflammation, and neurological benefit. Not visible to the naked eye.

What the research supports

Accelerated muscle recovery

Multiple randomized controlled trials show reduced DOMS, faster return to performance, and decreased creatine kinase markers following red light therapy sessions post-exercise.

Reduced inflammation

PBM has been shown to modulate pro-inflammatory cytokines, including TNF-alpha and IL-6. Relevant for chronic joint pain, post-surgical recovery, and systemic inflammatory conditions.

Improved sleep quality

Studies show measurable improvements in sleep quality scores and melatonin regulation following consistent use — particularly when sessions occur in the evening away from blue light exposure.

Skin health and collagen

660nm red light stimulates fibroblast activity and collagen type I and III production. Clinical outcomes include improved skin tone, reduced fine lines, and accelerated wound healing.

Joint and tendon support

Near-infrared penetration into connective tissue has shown benefit for osteoarthritis, tendinopathy, and joint pain — with several trials reporting significant reductions in pain scores versus placebo.

Cellular energy

The foundational mechanism of PBM — upregulation of cytochrome c oxidase — directly increases ATP output in treated tissue. This is why consistent use compounds over time.

This page is for educational and wellness purposes only and is not medical advice. Solah does not make medical claims. Results vary by individual. Consult your physician before beginning any new wellness routine.