Red vs. Near-Infrared Light for Skin: What’s the Difference?

How red and near-infrared light support collagen, circulation, and skin health at different depths

When it comes to light therapy for skin support, not all wavelengths work the same way. Red and near-infrared (NIR) light both stimulate the skin—but they reach different layers and offer distinct benefits.

In this guide, we’ll break down the science behind each type of light, how they complement each other, and what to look for in a safe, effective at-home device.

What You’ll Learn

• The science behind red (≈ 620–750 nm) and near‑infrared (≈ 700–990 nm) light

• How each wavelength reaches different depths in the skin

• Unique benefits at the surface vs. deeper layers

• How combining both can create a fuller, science-backed routine

1. What Is Light Therapy?

Red and near-infrared light are forms of photobiomodulation—a gentle, non-invasive therapy that uses light to stimulate natural biological processes in the skin.

These wavelengths are well-studied in dermatology and aging research, especially for their ability to support:

• Collagen production

• Skin repair

• Circulation

• Reduced inflammation

2. Red Light: Surface-Level Support

Wavelength range: ≈ 620–750 nm

Red light targets the upper layers of the skin, where it helps:

• Stimulate fibroblasts, the cells that produce collagen and elastin

• Improve skin texture, tone, and radiance

• Calm surface-level inflammation

Ὄc Clinical insight:
A 2014 randomized clinical trial involving 30 sessions of red light therapy showed measurable improvement incomplexion, collagen density, and smoothness—with no adverse effects reported. View study on PubMed

3. Near-Infrared Light: Deeper Repair

Wavelength range: ≈ 700–990 nm

Near-infrared light travels deeper—into the subcutaneous tissues, where it supports:

• Blood flow and microcirculation

• Connective tissue repair

• Reduction of deep-seated inflammation

💡 Key point:
When dosed properly, NIR light also stimulates collagen and elastin—just like red light—but reaches deeper layers of the skin, including the dermis and subcutaneous tissue.

4. Why Combining Both Works Best

Together, red and NIR light create a layered approach to skincare:

• Red light refreshes the surface: improves tone, fine lines, and barrier repair

• NIR light works deeper: supports healing, calms inflammation, enhances circulation

Studies support using both wavelengths in tandem to stimulate collagen and aid skin healing at multiple depths.

5. Safety & Dosing Guidelines

Clinical use of red and near-infrared (NIR) LED light therapy for skin concerns is considered very safe when following established protocols.

Here’s what the research shows:

• No serious side effects reported in clinical trials focused on LED photobiomodulation for skin rejuvenation and aging

• Light intensity and heat levels remain within safe ranges to prevent burns or skin irritation when used according to clinical LED guidelines

• The Arndt–Schulz principle applies: more isn’t always better. Both under- and over-dosing can reduce effectiveness

Occasional mild redness may occur and typically resolves quickly.

These safety conclusions apply specifically to low-level LED therapy—not to ablative or high-intensity laser treatments, which involve different risks and mechanisms.

6. Choosing a Safe, Effective Device

If you’re considering at-home light therapy, choosing a device that meets clinical standards matters.

Look for a mask or panel that:

• Uses both red (~660 nm) and NIR (~850 nm) LEDs

• Follows safe dosing levels for power and session length

• Includes eye protection for comfort and safety

• Is FDA-cleared for at-home skincare use

7. The Juveo R1: Designed for Skin at Every Depth

The Juveo R1 Mask was developed to integrate these evidence-based standards:

• Dual wavelengths: red and NIR for multi-depth support

• Built-in shielding for eye safety

• Calibrated light intensity

• FDA clearance for everyday, non-invasive use

🔗 Explore the R1 LED Mask

8. Final Thoughts: A Balanced Approach to Skin Support

Red and near-infrared light therapy each play a distinct role in supporting skin health—one at the surface, the other deeper down.

Used together in a safe, clinically guided way, they create a powerful routine for promoting firmness, healing, and glow—especially for skin over 40.

Curious about how light therapy fits into a skincare routine after 40? Read our full guide here.

A high-quality, science-backed device can help you access these benefits from the comfort of home—safely and consistently.