LED Light Therapy for Skin: What Science Shows

LEDs are increasingly used in dermatology to treat acne, wounds, herpes, and skin aging. Research confirms effectiveness for some conditions, but not all uses are equally supported. Safety is generally high, with few adverse effects reported.

What the Science Says

Recent research reviews and meta-analyses have explored the therapeutic use of light-emitting diodes (LEDs) in dermatology. LED therapy leverages specific wavelengths of non-ionizing light most commonly red, blue, and near-infrared to stimulate cellular activity through photobiomodulation. This method affects chromophores in the skin, altering biological processes like inflammation, collagen synthesis, and cell proliferation (Jagdeo et al., 2018; Ngoc et al., 2023).

The strongest evidence supports LED use for acne vulgaris, herpes simplex and zoster, and acute wound healing. Meta-analyses show that blue LEDs (around 415 nm) significantly reduce acne lesions by killing acne-causing bacteria and decreasing oil gland activity, while red LEDs (around 633 nm) help reduce inflammation (Ablon, 2018; Ngoc et al., 2023).

Clinical studies also show that near-infrared LEDs can accelerate healing of herpes sores and surgical wounds by improving blood flow and cell regeneration. In randomized trials, herpes lesions healed 2–3 days faster with LED use than with standard treatments alone (Jagdeo et al., 2018; Park et al., 2004).

Other applications like skin rejuvenation, psoriasis, and atopic dermatitis show potential but remain inconsistent. While some trials report improvement in wrinkles and elasticity after several weeks of treatment with red or infrared LEDs, others found minimal or no change compared to placebo or creams. Variability in treatment parameters - such as wavelength, intensity, and exposure time - complicates comparisons across studies. Devices used also vary widely in clinical power and delivery method, affecting results (Ngoc et al., 2023; Harvard Health Publishing, 2019).

Related Books ▼

The Remarkable Life of the Skin: An intimate journey across our surface

Monty Lyman

The Beauty Molecule: Introducing Neuroceuticals, the Breakthrough for Ageless Beauty

Dr Nicholas Perricone

The Skin Nerd: Your straight-talking guide to feeding, protecting and respecting your skin

Jennifer Rock

The Science of Beauty: Debunk the Myths and Discover What Goes into Your Beauty Routine

Michelle Wong

Real - World Performance

⚙️ Blue LED light consistently reduces acne-related inflammation and lesion count, with effects visible after 4–12 weeks of use.

⚙️ Red LED light improves acne and may support wrinkle reduction, but results vary by device and exposure regimen.

⚙️ Near-infrared LEDs can shorten healing time for herpes and surgical wounds when used adjunctively with standard care.

⚙️ LEDs are well tolerated with few side effects, though dry skin and temporary redness have been reported.

⚙️ Applications for psoriasis and eczema show mixed results and require more standardized research for clear guidance.

Good to Know

🔍 LED devices used in clinical studies are typically more powerful than over-the-counter home units.

🔍 Red and blue LEDs are safe for most users but may cause mild irritation in sensitive skin types.

🔍 People with photosensitive conditions or taking light-sensitizing medications should consult a physician before use.

🔍 Eye protection is advised during LED exposure, especially for home use devices.

🔍 Home-use LED devices are not yet widely backed by peer-reviewed efficacy studies.

🔍 Effects on skin cancer or pre-cancerous lesions should only be treated under medical supervision.

🔍 Some patients may see recurrence of symptoms (e.g., acne, psoriasis) after treatment stops.

Evidence-Based Reliability Score

Backed by randomized trials and meta-analysis with consistent results for acne and wound-related conditions. Some studies lack standardization and long-term safety data.

82%

The Consumer Takeaway

This body of research shows that LED light therapy holds real potential for treating common skin issues like acne, herpes, and wounds through non-invasive photobiomodulation. Blue and red wavelengths are particularly effective for targeting bacteria and inflammation, with minimal side effects reported.

While results for rejuvenation, psoriasis, and eczema are promising, they remain inconsistent across studies. Variability in devices and treatment protocols makes it difficult to compare outcomes universally. Still, the technology offers a safe and accessible approach for certain dermatologic conditions and is increasingly supported by clinical data.

NEWKEY LED Face Mask Light Therapy

Dual-action red and blue light therapy for clearer, firmer skin

Check out

Gadgets Connected to These Scientific Insights

The gadgets below each rely on the science discussed in this article — sometimes directly, sometimes through a clever variation of the same underlying technology.

For the best experience, we recommend reading the summary first. It gives you a quick, clear understanding of how the technology works and helps you decide whether these gadgets match what you’re looking for.

Amount of gadgets related to this article:

EXPLORE ALL GADGETS ➤

ALL GADGETS ➤

Explore other Gadget Related Articles:

Microneedling for Hair Loss: Efficacy and Mechanisms

Microneedling, a technique involving fine needles to stimulate the scalp, has shown promise in treating hair loss. This review explores its role both alone and in combination with treatments like minoxidil and PRP.

Research Strength

68%

Read Full Article ⮕

The Effect of Facial Muscle Exercises on Facial Features

New studies suggest that targeted facial exercises can enhance muscle thickness and facial firmness. These noninvasive methods may provide visible improvements in facial tone and contour, especially in middle-aged women.

Research Strength

71%

Read Full Article ⮕

Why You Should Work Out: Aerobic Exercise and HDL Cholesterol Levels

This meta-analysis clarifies how aerobic training affects HDL-C, a key cardiovascular health marker. It reveals the optimal amount and type of exercise needed to achieve meaningful cholesterol improvements.

Research Strength

84%

Read Full Article ⮕

Insufficient Sleep and Its Toll on Health and Safety

Scientific evidence continues to link inadequate sleep with serious physical, mental, and cognitive consequences. This overview explores how sleep impacts metabolism, mood, safety, and long-term health, and why sleep health is now a national public health priority.

Research Strength

97%