LED light therapy – scientific principles of operation – ZENT Care

Did you know that light can heal? Light therapy this is not science fiction but a proven medical method based on scientific foundations. LED phototherapy uses precisely selected wavelengths of light that stimulate natural regenerative processes in cells. Today you can use this technology in the comfort of your own home.

How does LED phototherapy work?

LED phototherapy works on a very simple principle – light provides energy to skin cells. When the appropriate rays reach the tissues, the cells start working more intensively, producing more energy needed for regeneration [1].

Different colors of light penetrate the skin to different depths. Red light (630-850 nm) penetrates deeper than blue or green – usually to a depth of a few millimeters up to about 1-2 cm [2]. Infrared light (above 940 nm) penetrates the deepest – it can reach up to 8 mm deep into tissues. Although most of the energy is absorbed at the surface, what reaches deeper helps the skin produce more collagen and speeds up regeneration [3].

Different wavelengths – different applications in light therapy

Red light (660-700 nm) – regeneration and rejuvenation

Red light therapy this is the best-studied form of phototherapy. Red light stimulates collagen synthesis, improves microcirculation, and supports wound healing. Clinical studies confirm its effectiveness in reducing wrinkles and improving skin elasticity [4].

Infrared light (700-850 nm) – pain and inflammation relief

Infrared light penetrates the deepest, relieving muscle and joint pain. It is especially effective in reducing inflammation and accelerating tissue regeneration [5].

Blue light (415 nm) – fighting bacteria

Blue light has antibacterial properties, which is why it is used in acne treatment. It eliminates bacteria Propionibacterium acnes responsible for causing skin inflammations [6].

ZENT® DermaLight™ – Smart 4-in-1 LED phototherapy mask on a woman's face in red light mode. She is holding the remote control in her hand

LED face mask – technology within reach

LED face maskThis is a revolution in home skin care. Modern devices offer precisely calibrated LED diodes that deliver the right dose of light without the risk of irritation. Unlike sun lamps or tanning beds, LED phototherapy does not emit harmful UV radiation.

ZENT® DermaLight™ combines four types of light, from red, through blue, to infrared and yellow. The special design keeps the light at an optimal distance from the skin, evenly illuminating the entire face without localized overheating or pressure.

What makes this mask stand out? It is as light as a smartphone – it weighs only 93 grams. It is made of safe medical silicone with a breathable structure, and the built-in shield protects the eyes from light. You can even wash it under the tap – it is completely waterproof.

Practical application of LED therapy at home

Preparation for the session

Before using the LED face mask, thoroughly cleanse the skin of cosmetics and impurities. Clean skin absorbs light better, which increases the therapy's effectiveness.

Session duration

The optimal session length is 10-20 minutes, depending on the device's power and the type of skin problem. Modern masks have built-in timers that automatically end the session at the appropriate time.

Frequency of use

For aesthetic problems such as wrinkles or loss of skin firmness, 2-3 sessions per week are sufficient. In the case of dermatological issues like acne or red capillaries, daily use may be necessary for the first 2-3 weeks, then reduced to several times a week [7].

In the photo, two women in bathrobes holding a glass of white wine. One of them is wearing the ZENT® DermaLight™ – an intelligent 4-in-1 LED phototherapy mask on her face, the other is massaging her face with the ZENT MiniPulse™ – a compact form percussion massager.

LED phototherapy is a scientifically proven method supporting skin health and appearance. Thanks to the precise selection of light wavelength, you can use technology at home that is used in dermatology clinics. Regular light therapy not only improves skin condition but also supports the body's natural regenerative processes, offering a safe alternative to invasive aesthetic treatments.

FAQ – most frequently asked questions

Is LED phototherapy safe?

Yes, LED phototherapy is a safe method, provided certified devices are used. Unlike lasers, LEDs do not cause thermal damage to the skin. However, avoid looking directly at the diodes during sessions [8].

When will the first effects be visible?

You may notice the first changes after 2-4 weeks of regular use, depending on the type of skin problem. Full effects in the case of aesthetic issues, such as wrinkle reduction or improved skin firmness, usually appear after 6-8 weeks of systematic therapy [9]. The skin becomes firmer, wrinkles are less visible, and the complexion gains a healthy glow. Consistency is key; effects gradually increase with each week of use.

Who should not use LED phototherapy?

Contraindications include: pregnancy, epilepsy, taking photosensitizing medications, active skin cancers at the application site. In case of dermatological problems, always consult a doctor before starting therapy.

References:

[1] Kuppa, S. S. et al. (2025). Red-light LED therapy promotes wound regeneration by upregulating COL1A1, COL2A1, VEGF and reducing IL-1β for anti-inflammation. Lasers in Medical Science.

[2] Finlayson, L. et al. (2021). Depth Penetration of Light into Skin as a Function of Wavelength from 200 to 1000 nm. Photochemistry and Photobiology.

[3] Barbora, A. et al. (2021). Higher pulse frequency of near-infrared laser irradiation increases penetration depth for novel biomedical applications. PLoS ONE.

[4] Chang, H. et al. (2025). Red light promotes dermis-epidermis remodeling via TGFβ and AKT-mediated collagen dynamics in naturally aging mice. Zoological Research.

[5] Hamblin, M. R. (2018). Mechanisms and Mitochondrial Redox Signaling in Photobiomodulation. Photochemistry and Photobiology.

[6] Cotter, E. J. et al. (2023). Antimicrobial effects of blue light therapy against cutibacterium acnes: optimal dosing and impact of serial treatments. JSES International.

[7] Ablon, G. (2018). Phototherapy with Light Emitting Diodes: Treating a Broad Range of Medical and Aesthetic Conditions in Dermatology. The Journal of Clinical and Aesthetic Dermatology.

[8] Guo, Z. et al. (2025). The Application of Light Emitting Diode (LED) in Cosmetic Dermatology. Photodermatology, Photoimmunology & Photomedicine.

[9] Sinclair, K. L. et al. (2014). Randomized Controlled Trial of Light Therapy for Fatigue Following Traumatic Brain Injury. Neurorehabilitation and Neural Repair.