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Light-emitting diodes (LED) have found widespread use in aesthetic medicine and cosmetology, mainly due to the possibility to stimulate the dermis without inducing a thermal effect. This is of particular importance in planning anti-aging therapies and wound healing. LED light stimulates fibroblast proliferation, collagen synthesis, growth factors, extracellular matrix production and skin microcirculation (used as different wavelengths of light: 590 nm, 630 nm, 633 nm, 830 nm). Furthermore, experiments with mice have shown the effectiveness of green waves (518 nm) in wound healing. This therapy can also prevent scarring. The impact of red waves (638 nm) is also interesting – they accelerate the rate of hair regrowth. Oddziaływanie światła LED na skórę – co nowego w badaniach z ostatnich lat? Część II: W procesach przebudowy skóry oraz wzroście włosów Effects of LED radiation on the skin – what is new in recent research? Part II. In skin remodeling processes and hair growth Agnieszka Dana, Mirella Batory, Anna Erkiert-Polguj, Anna M. Augustyniak, Helena Rotsztejn Zakład Kosmetologii i Dermatologii Estetycznej Uniwersytetu Medycznego w Łodzi Przegl Dermatol 2015, 102, 564–568 DOI: 10.5114/dr.2015.55708 SŁOWA KLUCZOWE: LED, starzenie się skóry, gojenie ran, blizny, wzrost włosów.