TL;DR
LED (Light Emitting Diode) light therapy has emerged as one of the most versatile and evidence-based supportive treatments in aesthetic medicine. Using specific wavelengths of non-thermal light to trigger cellular...
LED (Light Emitting Diode) light therapy has emerged as one of the most versatile and evidence-based supportive treatments in aesthetic medicine. Using specific wavelengths of non-thermal light to trigger cellular responses, LED therapy accelerates healing after procedures, reduces inflammation, stimulates collagen production, and kills acne-causing bacteria — all without pain, downtime, or side effects.
At Axiom Aesthetics, we incorporate LED therapy into many of our treatment protocols. This guide explains the science behind LED therapy, the different wavelengths used, and how it can be combined with other treatments for optimal results.
How LED Light Therapy Works
LED therapy operates through a process called photobiomodulation — the use of non-ionising light to stimulate cellular function. When specific wavelengths of light are absorbed by chromophores (light-sensitive molecules) within cells, a cascade of biological responses is triggered.
The Key Cellular Mechanism
The primary target is cytochrome c oxidase, an enzyme in the mitochondrial electron transport chain. When light at the appropriate wavelength is absorbed by this enzyme, it:
- Increases ATP (adenosine triphosphate) production — the cell’s energy currency
- Modulates reactive oxygen species (ROS) signalling
- Activates transcription factors that upregulate genes involved in cell proliferation, collagen synthesis, and anti-inflammatory pathways
- Releases nitric oxide, improving local blood circulation
LED Wavelengths and Their Effects
| Wavelength | Colour | Penetration Depth | Primary Effects | Best For |
|---|---|---|---|---|
| 415nm | Blue | Epidermis (1mm) | Kills P. acnes bacteria, reduces sebum | Active acne, oily skin |
| 590nm | Yellow/Amber | Superficial dermis (1–2mm) | Reduces redness, anti-inflammatory, lymphatic drainage | Rosacea, post-treatment redness, sensitive skin |
| 633nm | Red | Dermis (2–3mm) | Stimulates collagen, reduces inflammation, accelerates healing | Anti-ageing, wound healing, post-procedure recovery |
| 830nm | Near-Infrared (NIR) | Deep dermis/subcutis (3–5mm) | Deep tissue repair, anti-inflammatory, pain reduction | Deep healing, joint pain, post-surgical recovery |
The Evidence Base
Red LED (633nm) for Anti-Ageing
A landmark 2014 study published in Photomedicine and Laser Surgery by Wunsch and Matuschka randomised 136 participants to red (611–650nm) or near-infrared (570–850nm) LED treatment twice weekly for 30 sessions. Results showed statistically significant improvements in skin complexion, collagen density (measured by ultrasound), and reduction in wrinkle severity and roughness compared to controls.
Blue LED (415nm) for Acne
A 2004 study in the British Journal of Dermatology demonstrated that blue light therapy at 415nm reduced inflammatory acne lesion counts by 76% after 8 weeks of treatment (twice weekly). The mechanism involves photo-excitation of porphyrins produced by P. acnes bacteria, generating singlet oxygen that destroys the bacteria.
LED for Post-Procedure Healing
A 2018 systematic review of 12 studies found that LED therapy applied after aesthetic procedures (laser, peels, microneedling) significantly reduced erythema duration, accelerated re-epithelialisation, and improved patient comfort. The most effective protocols used red (633nm) and near-infrared (830nm) wavelengths within 24 hours of treatment.
LED Therapy Combined With Aesthetic Treatments
| Primary Treatment | LED Wavelength | Timing | Benefit |
|---|---|---|---|
| Microneedling | Red (633nm) + NIR (830nm) | Immediately after | Accelerated healing, enhanced collagen stimulation |
| Chemical peels | Red (633nm) + Yellow (590nm) | Same day or next day | Reduced redness, faster recovery |
| Laser/IPL | Red (633nm) + NIR (830nm) | Immediately after + follow-up sessions | Reduced erythema duration, less PIH risk |
| Injectables (filler/toxin) | Yellow (590nm) | Immediately after | Reduced bruising, less swelling |
| Facials | Any combination | During/after facial | Enhanced product penetration, additional benefits |
Expert Insight
“We include LED therapy as a complimentary add-on to many of our treatments because the evidence for post-procedure recovery is compelling. A 15–20 minute LED session immediately after microneedling or a peel can noticeably reduce recovery time and enhance results. It is one of the simplest, most cost-effective ways to optimise treatment outcomes. We often describe it as the ‘silent treatment enhancer.'”
— Clinical Team, Axiom Aesthetics
Professional vs Home LED Devices
| Factor | Professional (In-Clinic) | Home Devices |
|---|---|---|
| Power output | High (100–200mW/cm²) | Low to moderate (5–50mW/cm²) |
| Treatment time | 15–20 minutes | 10–30 minutes |
| Efficacy per session | Higher | Lower (requires more frequent use) |
| Cost | £50–£100/session | £50–£500 (one-time purchase) |
| Wavelength precision | Very precise, multiple wavelengths | Variable; some inexpensive devices have poor wavelength specificity |
| Evidence base | Strong (clinical studies use professional devices) | Growing but limited for many consumer brands |
Treatment Protocols
Standalone LED Therapy
- Anti-ageing: Red + NIR, 2–3 sessions per week, 10–12 weeks for initial course
- Acne: Blue + red, 2–3 sessions per week, 8–12 weeks
- Rosacea: Yellow + red, 1–2 sessions per week, 8–12 weeks
- Maintenance: Weekly or fortnightly sessions
Post-Procedure LED
- Single session immediately after treatment
- Follow-up sessions at 24 hours and 48 hours for more invasive procedures
- Combination wavelengths tailored to the primary treatment
Frequently Asked Questions
Is LED light therapy safe?
LED therapy has an excellent safety profile. Unlike UV light, LED wavelengths used in aesthetic treatments (blue 415nm, red 633nm, NIR 830nm) are non-ionising, non-thermal, and do not cause DNA damage. There are no known long-term adverse effects. The only contraindications are photosensitive epilepsy, use of photosensitising medications (some antibiotics, retinoids in high doses), and active skin cancer in the treatment area. LED is safe for all skin types and during most stages of pregnancy (though we recommend consulting your midwife first).
How many LED sessions do I need to see results?
For standalone anti-ageing or acne treatment, most studies show clinically significant improvement after 8–12 sessions (typically 2–3 per week over 4–6 weeks). Some patients notice improvements in skin clarity and radiance after just 3–4 sessions. For post-procedure recovery, a single session can noticeably reduce redness and discomfort. LED therapy is cumulative — consistent treatment produces the best results. Book a course at Axiom Aesthetics for the best value.
Can LED therapy replace other anti-ageing treatments?
LED therapy is best viewed as complementary rather than a replacement for other treatments. It provides gentle, cumulative improvement in skin quality but cannot match the degree of change achieved by microneedling, RF, chemical peels, or injectables. Its greatest strength is as a treatment enhancer — boosting and maintaining results from other procedures. We recommend LED as part of a comprehensive treatment plan rather than a standalone anti-ageing solution.
Are home LED devices worth the investment?
Quality home LED devices from reputable brands (e.g., Dermalux Flex, CurrentBody) can provide meaningful benefits when used consistently. However, they are typically less powerful than professional devices, requiring more frequent and longer sessions. For patients who cannot attend regular clinic appointments, a quality home device can maintain results between professional treatments. We recommend choosing devices that specify the exact wavelength, power density, and have clinical evidence. Avoid very cheap devices (<£50) as they often lack adequate power output.
Does LED therapy hurt?
LED therapy is completely painless. Patients experience a gentle warmth, particularly with red and near-infrared wavelengths, but no pain, stinging, or discomfort. The treatment involves lying comfortably with the LED panel positioned over the face or body for 15–20 minutes. Many patients find it relaxing. There is no sensation with blue or yellow wavelengths. This makes LED therapy an ideal treatment for patients who are nervous about more invasive procedures. Contact us to experience LED therapy at Axiom Aesthetics.
Medical Disclaimer
This article is provided for informational purposes only and does not constitute medical advice. While LED therapy has a strong safety profile, individual results vary. Patients taking photosensitising medications should consult their prescriber before LED treatment. Contact Axiom Aesthetics to discuss LED therapy for your skin.
This content is provided for informational purposes only and does not constitute medical advice. Individual results may vary. Always consult with a qualified medical professional before undergoing any treatment. All treatments carry potential risks and side effects which will be fully discussed during your consultation.
Medical Disclaimer: This content is provided for informational purposes only and does not constitute medical advice. Individual results may vary. Always consult with a qualified medical professional before undergoing any treatment. All treatments carry potential risks and side effects which will be fully discussed during your consultation.