Is red light therapy the same as infrared? Understanding the differences and benefits

At Sunlighten, we believe informed choices lead to better results. Here, we break down the science behind red light and infrared therapy, how each functions within the body, and why a precise, intentional approach to light wavelengths is key to achieving true, systemic wellness.

Not all light therapy is created equal

Red light and infrared represent distinct potions of the electromagnetic spectrum with unique biological effects.

The first and most essential distinction is this:

• Red light is visible.
• Infrared is invisible.

Both are forms of photobiomodulation, using light energy to influence cellular processes. However, they differ in their wavelengths, absorption mechanisms, and therapeutic targets. Understanding these differences is essential to selecting the right modality for your wellness goals.

Clinically supported benefits of red light therapy include:

• Rejuvenate and repair skin
• Boost collagen production, improving skin elasticity
• Prevent wrinkles
• Relieve pain and inflammation
• Improve sleep
• Support muscle recovery
• Reduce cellulite
• Strengthen the immune system

These surface-level effects make red light an effective choice for targeted aesthetic benefits, though its impact remains localized to the outermost tissues.

The health benefits of infrared light therapy include:

• Reduced inflammation and enhanced muscle recovery
• Improve circulation and reduced blood pressure
• Safe, natural detoxification through sweat
• Strengthen the immune system
• Better sleep
• Stimulate the metabolism for weight loss

When all of the benefits come together, they have the potential to extend healthspan and longevity.

How does the body absorb red light and infrared

While infrared’s ability to penetrate beneath the skin is often highlighted, the true efficacy of light therapy lies not only in how deep the light travels, but in how well the body absorbs and utilizes that energy.

• Red light and near-infrared are primarily absorbed by mitochondria within the cells. This interaction supports cellular repair, collagen synthesis, and anti-inflammatory processes.
• Mid- and far-infrared wavelengths are absorbed by water molecules throughout the body, generating gentle thermal energy that enhances circulation, cardiovascular function, detoxification through sweating, and parasympathetic nervous system activation.

This elegant relationship between wavelength and absorption is what allows infrared therapy to work systemically, promoting balance and recovery throughout the body—not just where the light is applied.

Targeted treatments, systemic benefits

Scientific research supports that even when light energy is delivered to a specific area of the body, the effects can extend systemically. This happens through the transfer of light energy into the capillaries and bloodstream, allowing therapeutic benefits to circulate beyond the initial point of contact.

This is why infrared therapy is trusted not only for muscle recovery or joint relief, but also for supporting broader outcomes like immune health, stress reduction, and cardiovascular wellness.

Experience the Difference with Sunlighten

At Sunlighten, we believe effective wellness technology must be rooted in science, not trend. Our commitment to clinically backed innovation means that every sauna we build is designed to deliver targeted, measurable, and transformative results.

Choosing the right light therapy starts with understanding how your body responds to different wavelengths. Whether your focus is skin rejuvenation, muscle recovery, detoxification, or longevity support, Sunlighten’s full-spectrum infrared technology and red light therapy offers a uniquely comprehensive approach to wellness.